PMID: 15378869Sep 24, 2004Paper

Electromyography study of the hamstring muscles while exercising on a bicycle and the Roman table

Electromyography and Clinical Neurophysiology
A D P BankoffA C Moraes

Abstract

During the past few years electromyography has been used a lot in developing research in the science of sports; it has made a great contribution to what is called muscle biomechanics. The Biceps Femoris (long head), Semitendinosus and Semimembranosus bi-articulated muscles make up the muscle group called Hamstring; they act in articulated movements of the hip (extensors) and in articulated movement of the knee (flexors). In this sense, the Hamstring have been the object of many investigations, precisely because they are bi-articulated. All the Hamstring pass through the knee's articulation producing flexing as well as leg rotation and their effectiveness as hip extensors depends on the positioning of the knee's articulation, Hamill, Knutzen (1999). The knee's flexor muscles (Biceps Femoris - long head, Semimembranosus and Semitendinosus) were studied using electromyography with surface electrodes in 10 male subjects between 19 and 25 years old. They included five who used a stationary bicycle and five doing activities on the roman table. Knee flexing on the roman table (concentric and eccentric action) was performed in the ventral decubitus position. Surface electrodes with electro-conductive gel were used to register the actio...Continue Reading

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