When an athlete is on the starting blocks it should be noted that the hip of the front leg is viewed to be flexed while the back hip is fully on the extension when the athlete is on the “go” (Fu, et al,.2016). Moreover, upon firing the starting gun it should be noted that the athlete makes the first step, and the biomechanics of this movement reveals that the front leg has its hip experiencing extension which is primarily caused by gluteus maximus with assistance with the inferior part of Adductor Magnus. The rear hip is flexed in the first step which is brought about by psoas as the main muscle aided by iliacus muscles ( Carr, 2014) .
During the count 1, the hip is an experienced extension which is caused by hamstring and the gluteus maximus muscles. the hamstring muscle is located at the back of the thigh while the gluteus maximus is the main muscle that covers the lower part of human body and responsible for the round shape of the buttocks being witnessed. Moreover, in count 2 hip will experience flexion that results from iliacus muscles. It should be noted that Bicep Femoris allows for both extension and flexion of the hips ( Norkin, & White,2016) .
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According to Carr extension of the knee joint is caused by Sartorius and quadriceps femoris which are usually a group of muscles. The quadriceps femoris does not only perform the function of extending the lower leg at the knee joint but it also stabilizes and protects the patella. It should be noted that study has shown it that women have larger q angle than men ( Norkin, & White, 2016) . It should be noted that the action of bringing the legs to touch the buttocks is performed by the gastrocnemius muscles in collaboration with the soleus muscles. The two muscles work through Achilles tendon.
References
Carr, J. H. (2014). Neurological Rehabilitation, 2/e . Elsevier India.
Fu, F. Q., Wang, S., Shu, Y., Li, J. S., Popik, S., & Gu, Y. D. (2016). A Comparative Biomechanical Analysis the Vertical Jump Between Flatfoot and Normal Foot. In Journal of Biomimetics, Biomaterials and Biomedical Engineering (Vol. 28, pp. 26-35). Trans Tech Publications.
Norkin, C. C., & White, D. J. (2016). Measurement of joint motion: a guide to goniometry . FA Davis.
