![]() The trapezius elevates the shoulders and extends while the pectorals flex when the arms moves. This is constantly swapping as the athlete swings their arms from side to side. ![]() At the same time the right external oblique is lengthening. Whilst the athlete is moving to the left, the left hand side obliques shorten, performing the concentric muscle contraction. Because the body is moving from side to side, the external obliques flex as the trunk rotates. This allows for the muscle length to increase so that muscle is completing an eccentric contraction. The erector spinae allows for the back to extend when the individual swings their arms back and forth around their body in preparation of releasing the discus. For the knee to be able to flex, the gastrocnemius and the hamstrings perform a concentric movement whilst the quadriceps and tibialis anterior create the eccentric movement because they lengthen. The tibialis anterior, located near the tibia, allows the feet to produce the action of dorsiflexion, inversion and eversion. The entire muscular system is required to enable to discus throw. The muscular system also plays a major role in throwing a discus. It is then in a pronation position when extended forward. The elbow, which is a hinge joint, allows bending when coming back across the body after hyperextension behind the body. The fingers extend when releasing the discus in order to get distance. The carpals in the wrist are gliding joints, which rotate and flex as the arm swings back and forth across the body in order to keep a solid grip on the discus. The phalanges and the metacarpals flex as the discus is gripped. The pelvis which is a ball and socket joint allows flexion in the legs. The patella is a condyloid joint is in a bent while the tibia, fibula and femur are all flexing as rotation is taking place. Included in the trunk is the sternum and the rib cage. When the individual spins, the vertebral allows the trunk to rotate from side to side. The vertebral column, consisting of the cervical vertebrae, thoracic curvature and the lumbar curvature, allows movement in the trunk. ![]() During the whole throw, the legs are constantly flexed and extension is not made until the discus has been released and the athlete is not longer in motion. During the discus throw, the athlete lifts one foot in a plantar flexion whilst the other foot stays in the dorsiflexion position. The tarsals in the ankles are gliding joints which allow for the ankles to create the joint action of dorsiflexion and plantar flexion when the individual turns their body in preparation for the throw. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |