Kinesiology Corner: The Hamstring Curl

Christ, Scott; Knortz, Karen

doi:10.1519/0199-610x(1981)003<0052:thc>2.3.co;2

Cited by 1 publication

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“…The athlete has to then lift the padded roller with the tendon and rotate the lower leg near the glutes by using hamstring. In that case, the distribution of force is assumed to be uniform and targets only hamstring muscle neglecting its effects on other muscles such as calves and glutes (Christ & Knortz, 1981). An athlete performing leg curl has to remain static and maintain a firm grip of their hands on the handle bar of the machine provided (Christ & Knortz, 1981).…”

Section: Introductionmentioning

confidence: 99%

“…In that case, the distribution of force is assumed to be uniform and targets only hamstring muscle neglecting its effects on other muscles such as calves and glutes (Christ & Knortz, 1981). An athlete performing leg curl has to remain static and maintain a firm grip of their hands on the handle bar of the machine provided (Christ & Knortz, 1981). The study of muscle contraction has been carried out in the past which uses Newton's laws of motion under the linear and quadratic approximation of the medium resistance (Milošević, et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Eccentric and Concentric Motion Motion of Hamstring during the Leg Curl

Thapa

Basnet

Khanal

2021

J. Inst. Sci. Tech.

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The force experienced by the hamstring during the leg curl has been numerically investigated using the conservation theorem. The center of the meniscus is assumed to be the pivot point along with the uniform distribution of forces in the frictionless environment. The variation of force experienced by the hamstring during the concentric motion of the leg curl has been derived and graphically illustrated. It is found that the force experienced by the hamstring increases with the increase in length of the lower leg and its weight as well. The magnitude of force decreases with the increase in distance from the pivot to insertion. However, the magnitude of force increases from about 3.60 to 4.79 kN in the practically valid region 3 to 4 cm distance from the pivot to insertion with the increase in weight of lower leg from 5 to 15 kg. On the other hand, the magnitude of force increases from about 3.75 to 9.80 kN with the increase in weight suspended on the machine from 10 to 40 kg. In addition, the force decreases with the increase in upper leg dimension, but it linearly increases with the increase in the angle of suspension.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%