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force produced. An experiment was conducted on bicycle riding. The amount of oxygen consumption was measured during the motion of pedaling forward as positive work and pedaling with resistance as negative work. Less oxygen was consumed during negative work than of positive work with the oxygen consumption ratio being 3:7. Due to the low oxygen consumption of eccentric exercise studies have been conducted on patients with severe COPD. An eccentric cycling exercise workout was created for these patients and the results found there to be no side effects, minimal muscle soreness that had no effect on power, and high compliance. Furthermore, other cycling studies concluded that eccentric cycling was a safe alternative for COPD patients as they can perform high-intensity work with lower cost.
493:
38:
677:, where the tendons become injured, inflamed, or ruptured. While typically these disorders are directly related to eccentric muscle movements, the ability of a muscle to strengthen and prevent injury through eccentric training is great. Controlled rehabilitative regimes will actually strengthen and repair tendons. Ample evidence supports the notion that the tendon, like the muscle, can adapt favorably to
439:
by people afflicted with the above disorders and many cannot participate in rigorous exercise protocols. Eccentric muscle contractions produce high forces with low-energy costs. According to Hortobágyi due to these properties, eccentric exercise has the greatest potential for muscle strengthening. To strengthen muscle the external force must exceed the muscle while it lengthens. The definition of
461:
after twenty sessions of treadmill low-intensity eccentric training the wet weight of the muscles and the fiber cross-section was significantly larger than the control and level groups. These results led to the conclusion that low-intensity eccentric contractions have the ability to "produce enough mechanical stress to induce
483:
A lot of studies have been conducted regarding eccentric exercise over the last decade. It can be said there is substantial evidence that eccentric exercise truly exceeds concentric exercise for rehabilitation and training aspects in force, energy cost, oxygen consumption, and muscular strengthening.
465:
without over-stressing which could produce muscle fiber damage. Other articles have found that muscle damage is not required to reach hypertrophy. Greater mechanical stress brought on by eccentric contractions is what leads to hypertrophy in individuals undergoing eccentric training. Studies done on
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Eccentric exercise or resistance training is currently being used as a form of rehabilitation for sports injuries, but also as an alternative form of exercise for the elderly and those affected by neurological disorders, COPD, cardiopulmonary disorders, and cancer. Muscle loss is a big problem faced
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With the lower cost of oxygen, how would eccentric exercise affect the heart? A study was performed to test how eccentric and concentric contractions affect cardiac autonomic modulation after exercise. Men (aged 18–30) were divided into four groups: concentric control, eccentric control, concentric
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is the progressive loss of muscle mass due to aging. Muscle mass begins to deteriorate as early as the age of 25, and consistently deteriorates into old age. By the age of 80 "one-half of the skeletal muscle has been lost" (Lastayo, Woolf, Lewek, Snyder-Mackler, Reich & Lindstedt, 2003). With
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rehabilitation is improving muscle strength of the quadriceps without re-injury. Early, high-force eccentric training can be used to increase muscle strength and volume without damage to the ACL graft, surrounding soft tissue, and the articular cartilage. In an experiment performed on rat muscles
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is lower than normal levels. Bone mass is affected by muscle forces and their loads on the bone structure. The strength and density of the bone are directly influenced by local strain. Due to the high strain on muscles during eccentric training, coupled with low energy output, eccentric training
472:
Oxygen consumption is needed for muscles to work properly. Eccentric muscle contractions are considered to be negative work as the muscle is working with resistance. Negative work is the mechanical energy absorbed by the work conducted on a muscle when the force on the muscle is greater than the
719:
Several recent studies have indicated that eccentric exercise as walking down hill has greater beneficial effects on insulin sensitivity, lipid profiles, and physical fitness than walking up hill. One study used stairs and elevators and the other a mountain and a cable car. In both cases the
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of the knee. During the post-operative rehabilitation of patients, eccentric training can be used as a cornerstone of developing muscle size and strength. According to tests conducted by J. Parry Gerber in 2007, structural changes in the muscles greatly exceeded those achieved with standard
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and colleagues looked at which method of tendon rehabilitation exercise – the "eccentric squat" exercise or the universal gym "leg extension/leg curl" — produced more recovery results in terms of recovery in the treatment of chronic patellar tendonitis. On the twelve-week exercise program,
643:
Eccentric training is of huge benefit to those that wish to avert injuries by improving the muscle's abilities to absorb more energy before deteriorating. According to one article, "Increased stiffness in tendons, greater force at failure, and an improved ability to absorb energy at the
361:(RBE). To help prevent or lessen DOMS from eccentric exercise, or to facilitate recovery from it, the exerciser would eccentrically stimulate the muscle, then repeat at weekly intervals to build up strength and allow the strain (in response to a given force level) to reduce over time.
224:
of the device was low, the same force was being applied by both individuals, yet the task was much easier for the individual braking. This demonstration cleverly revealed that a tiny female resisting the movement of the pedals could easily exert more force than, and hence control the
333:
When in a concentric exercise, shortening of a muscle occurs as the myosin and actin cross-bridges repeatedly attach and detach to draw the actin across the myosin – creating force. Each cross-bridge attachment and detachment cycle is powered by the splitting of one molecule of
369:
Eccentric contractions are a frequent cause of muscle injury when engaging in unaccustomed exercise. But a single bout of such eccentric exercise leads to adaptation which will make the muscle less vulnerable to injury on subsequent performance of the eccentric exercise.
349:
myosin and actin links. With more cross bridges remaining attached there is greater force production in the muscle. Examples of activities involving eccentric muscle contraction include walking down a hill or resisting the force of gravity while lowering a heavy object.
710:
or hamstring moment of force and hamstring moment of force significantly increased in both groups, but the eccentric squat saw significantly lower pain ratings and produced twice as many pain-free subjects at the end of the program than the other group.
603:
this great decrease in mass, strength is also decreased. Eccentric training has the ability to counteract sarcopenia through sustained training. The unique trait of greater overloads to the muscle with less strenuous impact on the body, as well as
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There is a stipulation regarding eccentric contractions in that they actually cause muscle damage and injury. Eccentric contraction may result in delayed onset muscle soreness however; the contraction itself does not cause muscle damage or injury.
271:
is absorbed in running every time one's foot strikes the ground and continues as one's mass overtakes the foot. At this moment, elastic recoil energy is at its maximum and a large amount of this energy is absorbed and is added to the next stride.
2029:
Gerber, Marcus; Parry, J.; Robin, L.; Dibble, Leland E.; Greis, Patrick E.; Burks, Robert T.; LaStayo, Paul C.; March (2007). "After
Anterior Cruciate Ligament Reconstruction Effects of Early Progressive Eccentric Exercise on Muscle Structure".
1748:
Gerber, Marcus; Parry, J.; Robin, L.; Dibble, Leland E.; Greis, Patrick E.; Burks, Robert T.; LaStayo, Paul C.; March (2007). "After
Anterior Cruciate Ligament Reconstruction Effects of Early Progressive Eccentric Exercise on Muscle Structure".
2176:
Roig, M.; O'Brien, K.; Kirk, G.; Murray, R.; McKinnon, P.; Shadgan, B.; Reid, W. D. (2009). "The effects of eccentric versus concentric resistance training on muscle strength and mass in healthy adults: A systematic review with meta-analysis".
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It has been deduced that high muscle-tendon forces delivered in a controlled environment are needed for optimal tendon adaptation. While eccentric stress is related to the injury, high-force eccentric exercises are needed to maximize recovery.
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Roig, M.; O'Brien, K.; Kirk, G.; Murray, R.; McKinnon, P.; Shadgan, B.; Reid, W.D. (2009). "The effects of eccentric versus concentric resistance training on muscle strength and mass in healthy adults: a systematic review with meta-analysis".
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movement. The close relationship between the muscle and tendons help to dissipate heat or temporarily store kinetic energy. If the forces needed to slow down a limb exceed the capacity of the muscle-tendon system, injury is likely to occur.
105:
back down from the lift is the eccentric phase of that exercise – as long as the dumbbell is lowered slowly rather than letting it drop (i.e., the biceps are in a state of contraction to control the rate of descent of the dumbbell).
466:
the elderly show that low-intensity eccentric conditioning can actually minimize muscle damage
According to Gault the low cost of energy and low oxygen demand make low-intensity eccentric exercise ideal for the elderly.
639:
injuries have greater impairment of eccentric strength, suggesting that improvements in eccentric training may minimize the risks of injury by strengthening the muscle-tendon groupings in high-stress areas of the body.
1974:
Bahr, Roald; Fossan, Bjorn; Loken, Sverre; Engebretsen, Lars; August (2006). "Surgical
Treatment Compared with Eccentric Training for Patellar Tendinopathy (Jumpers Knee) A Randomized Controlled Trial".
1834:
Bahr, Roald; Fossan, Bjorn; Loken, Sverre; Engebretsen, Lars; August (2006). "Surgical
Treatment Compared with Eccentric Training for Patellar Tendinopathy (Jumpers Knee) A Randomized Controlled Trial".
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training, and eccentric training. Results concluded that resistance training (eccentric contractions) promoted strength gain. An increase in cardiac vagal modulation during recovery was also concluded.
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Eccentric training creates greater force owing to the "decreased rate of cross-bridge muscle detachments." Patients and athletes will have more muscle force for bigger weights when eccentric training.
93:
that involves using the target muscles to control weight as it moves in a downward motion. This type of training can help build muscle, improve athletic performance, and reduce the risk of injury. An
264:, and can be recovered and reused by the body. This creates more efficiency because the body is able to use the energy for the next movement, decreasing the initial impact or shock of the movement.
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A condition that arises when the tendon and the tissues that surround it, become inflamed and irritated. This is usually due to overuse, especially from jumping activities. This is the reason
1522:"The influence of resistance exercise with emphasis on specific contractions (concentric vs. eccentric) on muscle strength and post-exercise autonomic modulation: a randomized clinical trial"
279:, where the muscle is continually shortened and stretched resulting in enhanced effectiveness and force. It can lead to the perception of "less effort" even though dealing with higher force.
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Older individuals are less vulnerable to injury from eccentric exercise, primarily because of the reduced strain on muscle-tendon groupings as compared to traditional concentric exercise.
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Chen, T.C.; et al. (2013). "Low-intensity eccentric contractions attenuate muscle damage induced by subsequent maximal eccentric exercise of the knee extensors in the elderly".
1878:
Chen, Trevor; Hsieh, Chung-Chan; Tseng, Kuo-Wei; Ho, Chih-Chiao; Nosaka, Kazunori (2017). "Effects of
Descending Stair Walking on Health and Fitness of Elderly Obese Women".
560:. Eccentric training enables the elderly, and those with the same problems, the ability to train muscle groups and increase strength and resiliency with low-energy exercise.
694:
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discovered in 1882 that "contracting muscle under stretch could produce greater force than a shortening muscle contraction" like in concentric movements. Fifty years later,
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that is stronger than the muscle force. When myofilaments of the muscle fiber are stretched in such eccentric contractions there can be reduced numbers of detachments of
220:
back-to-back with a single chain, such that one cyclist pedaled forward and the other resisted this forward motion by braking the backward-moving pedals. Because the
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While energy costs remain low, the degree of force is very high. This leads to muscles that respond with significant increases in muscle strength, size, and power.
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concentric rehabilitation. The success of the involvement of gradual progressive exposure to negative work ultimately led to the production of high muscle force.
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training to prevent injuries or recurring injuries, and trains the body to use the kinetic force driven by eccentric training more efficiently. Canadian
Olympian
261:
97:
is the motion of an active muscle while it is lengthening under load. Eccentric training is repetitively doing eccentric muscle contractions. For example, in a
620:
358:
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But time matters in elastic recoil. If this energy is not used quickly it is dissipated as heat. The role of eccentric training is to use these principles of
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systems, offers a unique case for the elderly. The high-force and low-cost set of attributes in eccentric exercise makes it ideal for the actively impaired.
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During the eccentric phase of the movement, the muscle absorbs energy. This work is done "by stretching the muscle and in this process, the muscle absorbs
2058:
Howlett K., T. Keniston, A. Grassl, A. Olsson, C. Eidem, and D.J. McCann, January 2011 Department of
Exercise Science, Gonzaga University, Spokane, WA.
877:
Lindstedt, S. L.; LaStayo, P.C.; Reich, T.E.; December (2001). "When Active
Muscles Lengthen: Properties and Consequences of Eccentric Contractions".
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Lindstedt, S. L.; LaStayo, P.C.; Reich, T.E.; December (2001). "When Active
Muscles Lengthen: Properties and Consequences of Eccentric Contractions".
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With eccentric training, muscles are able to create more for less work, which has special meaning in the realms of high-performance sports – both for
194:
417:. "Completing bouts of eccentric training and then repeating the workout 1 week (or more) later will result in less DOMS after the second workout."
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Eccentric actions place a stretch on the sarcomeres to the point where the myofilaments may experience strain, otherwise known as exercise-induced
209:
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133:
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Eccentric training focuses on slowing down the process of muscle elongation to challenge the muscles, which can lead to stronger muscles, faster
346:
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586:(ACL) in the knee causes serious damage that can last several years and often requires surgery. The ACL is one of the four main stabilizing
698:
515:
uses eccentric training as part of her regime. The Esmonde Technique takes eccentric training and makes it available to the masses through
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According to tests, increases in both strength and muscle fiber are higher in eccentric training than in traditional concentric training.
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introduced eccentric training in 1953, with "ex" meaning "away from" and "centric" meaning "center". Hence, the term was coined to mean a
162:
This movement has also been described as negative training. This "negative" movement is necessary to reverse the muscle from its initial
426:
Total body eccentric training can raise resting metabolic rate by about 9 percent, with the greatest magnitude in the first two hours.
2062:
LaStayo, Paul C. PhD; Woolf, John M.; Lewek, Michael D.; Snyder-Mackler, Lynn; Trude-Reich, Lindstedt; Stan, L. PhD; October (2003).
1793:
LaStayo, Paul C. PhD; Woolf, John M.; Lewek, Michael D.; Snyder-Mackler, Lynn; Trude-Reich, Lindstedt; Stan, L. PhD; October (2003).
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LaStayo, Paul C. PhD; Woolf, John M.; Lewek, Michael D.; Snyder-Mackler, Lynn; Trude-Reich, Lindstedt; Stan, L. PhD; October (2003).
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Eccentric contractions use less energy and actually absorb energy that will be used as heat or elastic recoil for the next movement.
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Eccentric movement provides a braking mechanism for muscle and tendon groups that are experiencing concentric movement to protect
1097:
Lepley, L.K. (2013). "Effect of Eccentric Strengthening After Anterior Cruciate Ligament Reconstruction on Quadriceps Strength".
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found that "the body had lower energy demand during an eccentric muscle contraction than during a concentric muscle action".
1143:
Lindstedt, S.; et al. (n.d.). "When active muscles lengthen: Properties and consequences of eccentric contractions".
720:
cardiovascular improvements were greater for being lifted up and walking down than for walking up and being lowered down.
2099:"The positive effects of negative work: increased muscle strength and decreased fall risk in a frail elderly population"
1691:"Effects of eccentric exercise in patients with subacromial impingement syndrome: a systematic review and meta-analysis"
922:"The positive effects of negative work: increased muscle strength and decreased fall risk in a frail elderly population"
17:
204:
The first revelation of the functional significance of these properties occurred in a clever demonstration devised by
73:
48:
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Eccentric contractions use less metabolic energy, even though they can create more force than concentric actions.
523:. After having hip surgery in the summer of 2007, St-Pierre began to practice the Esmonde Technique with experts
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Rooyackers, J. (2003). "Eccentric exercise training in patients with chronic obstructive pulmonary disease".
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Gault, M.L. (2012). "Functional mobility of older adults after concentric and eccentric endurance exercise".
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414:
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In controlled release reversals of such concentric motions, the eccentric movement stretches the muscle with
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When the load exceeds the force that can be developed by the muscle at a constant length, as in an eccentric
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and optimal-performance training. For athletes and sports enthusiasts, this eccentric model can help with
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Hortobágyi, T.; et al. (1996). "Adaptive responses to muscle lengthening and shortening in humans".
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The energy that is absorbed by the muscle will be dissipated as heat if the muscle is being used as a "
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LaStayo, Paul C.; Ewy, Gordon A.; Pierotti, David D.; Johns, Richard K.; Lindstedt, Stan; May (2003).
920:
LaStayo, Paul C.; Ewy, Gordon A.; Pierotti, David D.; Johns, Richard K.; Lindstedt, Stan; May (2003).
357:(DOMS). One area of research that has much promise in relation to DOMS and eccentric exercise is the
2064:"Eccentric Muscle Contractions: Their Contribution to Injury, Prevention, Rehabilitation, and Sport"
1795:"Eccentric Muscle Contractions: Their Contribution to Injury, Prevention, Rehabilitation, and Sport"
1588:"Eccentric Muscle Contractions: Their Contribution to Injury, Prevention, Rehabilitation, and Sport"
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173:, the exercise is referred to as involving negative work, because the muscle is absorbing energy.
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Stretching of the muscles and eccentric training provides protection from injury or re-injury.
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This mechanical energy is dissipated or converted into one or a combination of two energies.
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1923:"Eccentric endurance exercise economically improves metabolic and inflammatory risk factors"
55:
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2013:
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The muscle has "tension producing tissue comprising small contractile units referred to as
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330:(muscle filaments or proteins) that overlaps to format a cross-bridge bond (attachment)".
8:
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The rehabilitative nature, low energy costs, high magnitudes of force, and low uptake of
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574:, eccentric training didn't improve pain or function more than other types of training.
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Several key findings have been researched regarding the benefits of eccentric training:
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Eccentric training has been found to be beneficial to those with a variety of physical
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2134:"When Active Muscles Lengthen: Properties and Consequences of Eccentric Contractions"
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1202:"Induction of Muscle Hypertrophy in Rats through Low Intensity Eccentric Contraction"
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Subjects report less weariness from eccentric training than from concentric training.
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1251:"Does Exercise-Induced Muscle Damage Play a Role in Skeletal Muscle Hypertrophy?"
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or the elderly and patients looking to rehabilitate certain muscles and tendons.
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all align eccentric exercise for both the elderly and rehabilitative functions.
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participants were tested for thigh circumference and quadriceps, and hamstring
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338:(ATP). Examples of such exercises include kicking a ball or lifting a weight.
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M, Zepetzauer; Drexel, H; Vonbank, A; Rein, P; Aczel, S; Saely, CH (2013).
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Clarkson PM1, Hubal MJ (2002). "Exercise-induced muscle damage in humans".
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An eccentric contraction is one of the distinct phases in the movement of
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musculotendonous junction result following eccentric exercise training".
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Eccentric training is particularly good for casual and high-performance
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1438:"Eccentric Cycle Exercise in Severe COPD: Feasibility of Application"
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706:. There was no significant difference between the groups in either
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The energy that is absorbed by the muscle can be converted into
2132:
Lindstedt, S. L.; LaStayo, P.C.; Reich, T.E.; December (2001).
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Larsson, Robin; Bernhardsson, Susanne; Nordeman, Lena (2019).
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may be in need of reorganization to comply with Knowledge's
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1973:
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963:
American Journal of Physical Medicine & Rehabilitation
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According to one systematic review and meta-analysis on
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is almost the exact definition of muscle strengthening.
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leads to more tenderness in eccentric, rather than pure
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1377:
1092:
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919:
2028:
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1442:
COPD: Journal of Chronic Obstructive Pulmonary Disease
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Eccentric training has proven to be an excellent post
1628:"Goalie St.Pierre Takes A Page From The Ballet World"
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is often called "jumper’s knee." A study was done by
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becomes a cornerstone of the rehabilitative process.
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Journal of Orthopaedic & Sports Physical Therapy
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Journal of Orthopaedic & Sports Physical Therapy
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Journal of Orthopaedic & Sports Physical Therapy
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1920:
552:is commonplace. Add to these factors disease and
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2011:
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1880:Medicine & Science in Sports & Exercise
499:healed from hip surgery with eccentric exercise
201:that moves away from the center of the muscle.
1620:
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58:to make improvements to the overall structure.
1255:Journal of Strength and Conditioning Research
673:Intense repetitive activities tend to create
470:Eccentric contraction and oxygen consumption:
454:Proof of muscle strengthening without damage:
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147:from damage as the contraction is released.
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1568:: CS1 maint: numeric names: authors list (
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477:Eccentric contractions and cardiac output:
275:This movement is similar to the action of
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2012:Bubbico, Aaron; Kravitz, Len; Ph (2010).
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1389:"The physiological cost of negative work"
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791:Bubbico, Aaron; Kravitz, Len; Ph (2010).
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229:of, a large burly male pedaling forward.
74:Learn how and when to remove this message
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286:to strengthen muscle and tendon groups.
1020:"The positive effects of negative work"
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1343:European Journal of Applied Physiology
1300:European Journal of Applied Physiology
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891:10.1152/physiologyonline.2001.16.6.256
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413:Repeated-bout Effect markedly reduces
216:. They connected two stationary cycle
2103:The Journals of Gerontology: Series A
2032:The Journal of Bone and Joint Surgery
1977:The Journal of Bone and Joint Surgery
1837:The Journal of Bone and Joint Surgery
1751:The Journal of Bone and Joint Surgery
1526:Brazilian Journal of Physical Therapy
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1024:The Journals of Gerontology: Series A
926:The Journals of Gerontology: Series A
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392:intervention for lower-body injuries.
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531:and Sahra Esmonde-White host of the
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1206:Journal of Physical Therapy Science
1018:LaStayo, P.C.; et al. (2003).
747:
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2179:British Journal of Sports Medicine
1648:British Journal of Sports Medicine
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652:Usually viewed as a precursor to
578:Anterior cruciate ligament damage
548:In old age, loss of strength and
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1499:10.1097/00004356-200303000-00006
1200:Wakako, T.; et al. (2014).
975:10.1097/00002060-200211001-00007
364:
302:". This leads to an increase in
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1538:10.1590/s1413-35552012005000141
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1099:Journal of Sport Rehabilitation
318:" that each contains a "thick (
1405:10.1113/jphysiol.1952.sp004755
1145:News in Physiological Sciences
1052:
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913:
623:works cohesively to slow down
13:
1:
1695:BMC Musculoskeletal Disorders
1061:Journal of Applied Physiology
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668:
647:
594:
572:shoulder impingement syndrome
355:delayed onset muscle soreness
2081:10.2519/jospt.2003.33.10.557
1892:10.1249/MSS.0000000000001267
1812:10.2519/jospt.2003.33.10.557
1605:10.2519/jospt.2003.33.10.557
1455:10.3109/15412555.2011.579926
1268:10.1519/jsc.0b013e31824f207e
7:
1073:10.1152/jappl.1996.80.3.765
723:
695:chronic patellar tendonitis
689:Chronic patellar tendonitis
373:
101:the action of lowering the
10:
2240:
1967:
584:anterior cruciate ligament
179:
1708:10.1186/s12891-019-2796-5
1393:The Journal of Physiology
1355:10.1007/s00421-012-2338-4
1312:10.1007/s00421-012-2517-3
1249:Schoenfeld, B.J. (2012).
535:workout to heal her hip.
488:Sports and rehabilitation
456:One recurring problem in
232:
2191:10.1136/bjsm.2008.051417
2116:10.1093/gerona/58.5.m419
1940:10.1177/2047487312444236
1660:10.1136/bjsm.2008.051417
1037:10.1093/gerona/58.5.m419
939:10.1093/gerona/58.5.m419
675:chronic tendon disorders
631:Athletes with recurring
447:Perceived muscle damage:
310:Physiological mechanisms
1487:Rehabilitation Research
289:
715:Cardiovascular changes
615:Muscle tendon injuries
500:
336:adenosine triphosphate
127:concentric contraction
969:(11 Suppl): S52–S69.
681:and eccentric loads.
525:Miranda Esmonde-White
495:
441:eccentric contraction
262:elastic recoil energy
119:isometric contraction
95:eccentric contraction
2044:10.2106/jbjs.f.00385
2018:IDEA Fitness Journal
2014:"Eccentric Training"
1989:10.2106/JBJS.E.01181
1849:10.2106/JBJS.E.01181
1763:10.2106/jbjs.f.00385
1218:10.1589/jpts.26.1623
1185:: CS1 maint: year (
1111:10.1123/jsr.22.2.150
797:IDEA Fitness Journal
793:"Eccentric Training"
621:muscle-tendon system
359:repeated-bout effect
123:isotonic contraction
1520:Gois, M.0. (2014).
1436:Vieira, D. (2011).
1387:Abbott, B. (1952).
735:Negative repetition
558:respiratory illness
222:internal resistance
56:editing the article
1927:Eur J Prev Cardiol
501:
463:muscle hypertrophy
434:Eccentric exercise
199:muscle contraction
87:Eccentric training
18:Eccentric overload
2224:Strength training
2141:News Physiol. Sci
1349:(11): 3699–3707.
1212:(10): 1623–1625.
879:News Physiol. Sci
821:News Physiol. Sci
730:Flywheel training
529:Classical Stretch
517:Classical Stretch
505:injury prevention
407:amongst patients.
284:energy conversion
239:mechanical energy
158:Negative movement
91:strength training
84:
83:
76:
49:layout guidelines
27:Strength training
16:(Redirected from
2231:
2210:
2172:
2138:
2128:
2118:
2093:
2083:
2055:
2025:
2008:
1983:(8): 1689–1698.
1961:
1960:
1942:
1918:
1912:
1911:
1886:(8): 1614–1622.
1875:
1869:
1868:
1843:(8): 1689–1698.
1831:
1825:
1824:
1814:
1790:
1775:
1774:
1745:
1739:
1738:
1728:
1710:
1686:
1680:
1679:
1642:
1636:
1635:
1634:. 17 April 2009.
1624:
1618:
1617:
1607:
1583:
1574:
1573:
1567:
1559:
1549:
1517:
1511:
1510:
1482:
1476:
1475:
1457:
1433:
1427:
1426:
1416:
1384:
1375:
1374:
1338:
1332:
1331:
1306:(4): 1005–1015.
1295:
1289:
1288:
1270:
1261:(5): 1441–1453.
1246:
1240:
1239:
1229:
1197:
1191:
1190:
1184:
1176:
1140:
1131:
1130:
1094:
1085:
1084:
1056:
1050:
1049:
1039:
1030:(5): M419–M424.
1015:
1009:
1008:
1002:
994:
958:
952:
951:
941:
917:
911:
910:
874:
853:
852:
816:
805:
804:
788:
304:body temperature
185:Adolf Eugen Fick
79:
72:
68:
65:
59:
40:
39:
32:
21:
2239:
2238:
2234:
2233:
2232:
2230:
2229:
2228:
2214:
2213:
2136:
2074:(10): 557–571.
1970:
1965:
1964:
1919:
1915:
1876:
1872:
1832:
1828:
1791:
1778:
1746:
1742:
1687:
1683:
1643:
1639:
1626:
1625:
1621:
1598:(10): 557–571.
1584:
1577:
1561:
1560:
1518:
1514:
1483:
1479:
1434:
1430:
1385:
1378:
1339:
1335:
1296:
1292:
1247:
1243:
1198:
1194:
1178:
1177:
1141:
1134:
1095:
1088:
1057:
1053:
1016:
1012:
996:
995:
959:
955:
918:
914:
875:
856:
817:
808:
789:
748:
743:
726:
717:
704:moment of force
691:
679:physical stress
671:
650:
637:abductor muscle
617:
597:
580:
509:explosive force
490:
436:
376:
367:
312:
292:
258:
235:
214:Murdoch Ritchie
195:Erling Asmussen
182:
160:
136:and increasing
121:(no movement),
117:; they include
80:
69:
63:
60:
54:Please help by
53:
41:
37:
28:
23:
22:
15:
12:
11:
5:
2237:
2227:
2226:
2212:
2211:
2185:(8): 556–568.
2173:
2147:(6): 256–261.
2129:
2109:(5): 419–424.
2094:
2059:
2056:
2026:
2009:
1969:
1966:
1963:
1962:
1933:(4)): 577–84.
1913:
1870:
1826:
1805:(10): 557–71.
1776:
1740:
1681:
1654:(8): 556–568.
1637:
1619:
1575:
1512:
1477:
1448:(4): 270–274.
1428:
1399:(3): 380–390.
1376:
1333:
1290:
1241:
1192:
1151:(6): 256–261.
1132:
1105:(2): 150–156.
1086:
1067:(3): 765–772.
1051:
1010:
953:
932:(5): M419-24.
912:
854:
806:
745:
744:
742:
739:
738:
737:
732:
725:
722:
716:
713:
690:
687:
670:
667:
649:
646:
616:
613:
596:
593:
579:
576:
489:
486:
435:
432:
431:
430:
427:
424:
421:
418:
411:
408:
393:
390:rehabilitation
386:
383:
375:
372:
366:
363:
343:opposing force
311:
308:
300:shock absorber
291:
288:
269:kinetic energy
257:
256:Elastic recoil
254:
253:
252:
249:
248:Elastic recoil
234:
231:
210:Brenda Bigland
181:
178:
159:
156:
138:metabolic rate
129:(shortening).
82:
81:
44:
42:
35:
26:
9:
6:
4:
3:
2:
2236:
2225:
2222:
2221:
2219:
2208:
2204:
2200:
2196:
2192:
2188:
2184:
2180:
2174:
2170:
2166:
2162:
2158:
2154:
2150:
2146:
2142:
2135:
2130:
2126:
2122:
2117:
2112:
2108:
2104:
2100:
2095:
2091:
2087:
2082:
2077:
2073:
2069:
2065:
2060:
2057:
2053:
2049:
2045:
2041:
2038:(3): 559–57.
2037:
2033:
2027:
2023:
2019:
2015:
2010:
2006:
2002:
1998:
1994:
1990:
1986:
1982:
1978:
1972:
1971:
1958:
1954:
1950:
1946:
1941:
1936:
1932:
1928:
1924:
1917:
1909:
1905:
1901:
1897:
1893:
1889:
1885:
1881:
1874:
1866:
1862:
1858:
1854:
1850:
1846:
1842:
1838:
1830:
1822:
1818:
1813:
1808:
1804:
1800:
1796:
1789:
1787:
1785:
1783:
1781:
1772:
1768:
1764:
1760:
1757:(3): 559–57.
1756:
1752:
1744:
1736:
1732:
1727:
1722:
1718:
1714:
1709:
1704:
1700:
1696:
1692:
1685:
1677:
1673:
1669:
1665:
1661:
1657:
1653:
1649:
1641:
1633:
1629:
1623:
1615:
1611:
1606:
1601:
1597:
1593:
1589:
1582:
1580:
1571:
1565:
1557:
1553:
1548:
1543:
1539:
1535:
1531:
1527:
1523:
1516:
1508:
1504:
1500:
1496:
1492:
1488:
1481:
1473:
1469:
1465:
1461:
1456:
1451:
1447:
1443:
1439:
1432:
1424:
1420:
1415:
1410:
1406:
1402:
1398:
1394:
1390:
1383:
1381:
1372:
1368:
1364:
1360:
1356:
1352:
1348:
1344:
1337:
1329:
1325:
1321:
1317:
1313:
1309:
1305:
1301:
1294:
1286:
1282:
1278:
1274:
1269:
1264:
1260:
1256:
1252:
1245:
1237:
1233:
1228:
1223:
1219:
1215:
1211:
1207:
1203:
1196:
1188:
1182:
1174:
1170:
1166:
1162:
1158:
1154:
1150:
1146:
1139:
1137:
1128:
1124:
1120:
1116:
1112:
1108:
1104:
1100:
1093:
1091:
1082:
1078:
1074:
1070:
1066:
1062:
1055:
1047:
1043:
1038:
1033:
1029:
1025:
1021:
1014:
1006:
1000:
992:
988:
984:
980:
976:
972:
968:
964:
957:
949:
945:
940:
935:
931:
927:
923:
916:
908:
904:
900:
896:
892:
888:
885:(6): 256–61.
884:
880:
873:
871:
869:
867:
865:
863:
861:
859:
850:
846:
842:
838:
834:
830:
826:
822:
815:
813:
811:
802:
798:
794:
787:
785:
783:
781:
779:
777:
775:
773:
771:
769:
767:
765:
763:
761:
759:
757:
755:
753:
751:
746:
736:
733:
731:
728:
727:
721:
712:
709:
705:
700:
696:
686:
682:
680:
676:
666:
663:
659:
655:
645:
641:
638:
634:
629:
626:
622:
612:
610:
606:
601:
592:
589:
585:
575:
573:
568:
566:
561:
559:
555:
551:
546:
544:
539:
536:
534:
530:
526:
522:
518:
514:
513:Kim St-Pierre
510:
506:
498:
497:Kim St-Pierre
494:
485:
481:
478:
474:
471:
467:
464:
459:
455:
451:
448:
444:
442:
428:
425:
422:
419:
416:
412:
409:
406:
402:
398:
394:
391:
387:
384:
381:
380:
379:
371:
365:Muscle injury
362:
360:
356:
351:
348:
344:
339:
337:
331:
329:
325:
321:
317:
307:
305:
301:
297:
287:
285:
280:
278:
273:
270:
267:For example,
265:
263:
250:
247:
246:
245:
242:
240:
230:
228:
223:
219:
215:
211:
207:
202:
200:
196:
192:
190:
186:
177:
174:
172:
171:muscle action
167:
165:
155:
153:
148:
146:
141:
139:
135:
134:muscle repair
130:
128:
124:
120:
116:
112:
107:
104:
100:
96:
92:
89:is a type of
88:
78:
75:
67:
64:February 2015
57:
51:
50:
45:This article
43:
34:
33:
30:
19:
2182:
2178:
2144:
2140:
2106:
2102:
2071:
2067:
2035:
2031:
2021:
2017:
1980:
1976:
1930:
1926:
1916:
1883:
1879:
1873:
1840:
1836:
1829:
1802:
1798:
1754:
1750:
1743:
1698:
1694:
1684:
1651:
1647:
1640:
1631:
1622:
1595:
1591:
1564:cite journal
1532:(1): 30–37.
1529:
1525:
1515:
1493:(1): 47–49.
1490:
1486:
1480:
1445:
1441:
1431:
1396:
1392:
1346:
1342:
1336:
1303:
1299:
1293:
1258:
1254:
1244:
1209:
1205:
1195:
1181:cite journal
1148:
1144:
1102:
1098:
1064:
1060:
1054:
1027:
1023:
1013:
999:cite journal
966:
962:
956:
929:
925:
915:
882:
878:
824:
820:
800:
796:
718:
692:
683:
672:
662:bone density
654:osteoporosis
651:
642:
630:
618:
598:
581:
569:
562:
547:
540:
537:
532:
528:
520:
516:
502:
482:
476:
475:
469:
468:
453:
452:
446:
445:
437:
377:
368:
352:
347:cross bridge
340:
332:
322:) and thin (
313:
293:
281:
274:
266:
259:
243:
236:
227:power output
203:
193:
183:
175:
168:
161:
149:
142:
131:
108:
94:
86:
85:
70:
61:
46:
29:
619:The entire
609:respiratory
582:Tearing an
550:muscle mass
527:from PBS's
328:myofilament
99:biceps curl
1701:(1): 446.
827:(6): 260.
741:References
708:quadriceps
699:Roald Bahr
669:Tendinoses
658:osteopenia
648:Osteopenia
600:Sarcopenia
595:Sarcopenia
533:Essentrics
521:Essentrics
403:or tendon
395:Increased
316:sarcomeres
218:ergometers
206:Bud Abbott
164:trajectory
1717:1471-2474
633:hamstring
588:ligaments
189:A.V. Hill
2218:Category
2199:18981046
2161:11719600
2125:12730250
2090:14620785
2052:17332105
2005:10659933
1997:16882889
1957:39990249
1949:22505055
1908:46849524
1900:28291022
1865:10659933
1857:16882889
1821:14620785
1771:17332105
1735:31610787
1668:18981046
1614:14620785
1556:24675910
1507:12601267
1472:12268422
1464:21728805
1423:14946742
1371:15904074
1363:22350353
1320:23064871
1285:28174205
1277:22344059
1236:25364129
1165:11719600
1127:22428839
1119:23238230
1046:12730250
991:35776352
983:12409811
948:12730250
899:11719600
841:11719600
724:See also
660:is when
565:ailments
405:swelling
374:Findings
152:athletes
103:dumbbell
2207:8380567
2169:6042407
1968:Sources
1726:6792214
1676:8380567
1547:4183241
1414:1392548
1328:1087978
1227:4210414
1173:6042407
1081:8964735
907:6042407
849:6042407
605:cardiac
554:cardiac
277:springs
180:History
115:tendons
111:muscles
2205:
2197:
2167:
2159:
2123:
2088:
2050:
2003:
1995:
1955:
1947:
1906:
1898:
1863:
1855:
1819:
1769:
1733:
1723:
1715:
1674:
1666:
1612:
1554:
1544:
1505:
1470:
1462:
1421:
1411:
1369:
1361:
1326:
1318:
1283:
1275:
1234:
1224:
1171:
1163:
1125:
1117:
1079:
1044:
989:
981:
946:
905:
897:
847:
839:
543:oxygen
320:myosin
296:damper
233:Energy
212:, and
145:joints
125:, and
2203:S2CID
2165:S2CID
2137:(PDF)
2024:: 10.
2001:S2CID
1953:S2CID
1904:S2CID
1861:S2CID
1672:S2CID
1468:S2CID
1367:S2CID
1324:S2CID
1281:S2CID
1169:S2CID
1123:S2CID
987:S2CID
903:S2CID
845:S2CID
803:: 10.
324:actin
2195:PMID
2157:PMID
2121:PMID
2086:PMID
2048:PMID
1993:PMID
1945:PMID
1896:PMID
1853:PMID
1817:PMID
1767:PMID
1731:PMID
1713:ISSN
1664:PMID
1610:PMID
1570:link
1552:PMID
1503:PMID
1460:PMID
1419:PMID
1359:PMID
1316:PMID
1273:PMID
1232:PMID
1187:link
1161:PMID
1115:PMID
1077:PMID
1042:PMID
1005:link
979:PMID
944:PMID
895:PMID
837:PMID
635:and
625:limb
607:and
556:and
519:and
415:DOMS
401:pain
397:DOMS
290:Heat
251:Heat
113:and
2187:doi
2149:doi
2111:doi
2076:doi
2040:doi
1985:doi
1981:88A
1935:doi
1888:doi
1845:doi
1841:88A
1807:doi
1759:doi
1721:PMC
1703:doi
1656:doi
1632:TSN
1600:doi
1542:PMC
1534:doi
1495:doi
1450:doi
1409:PMC
1401:doi
1397:117
1351:doi
1347:112
1308:doi
1304:113
1263:doi
1222:PMC
1214:doi
1153:doi
1107:doi
1069:doi
1032:doi
971:doi
934:doi
887:doi
829:doi
458:ACL
298:or
241:".
2220::
2201:.
2193:.
2183:43
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2101:.
2084:.
2072:33
2070:.
2066:.
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2036:89
2034:.
2020:.
2016:.
1999:.
1991:.
1979:.
1951:.
1943:.
1931:20
1929:.
1925:.
1902:.
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1884:49
1882:.
1859:.
1851:.
1839:.
1815:.
1803:33
1801:.
1797:.
1779:^
1765:.
1755:89
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1729:.
1719:.
1711:.
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1697:.
1693:.
1670:.
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1562:{{
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