Muscle Joint Movements

Muscle and joint actions both affect the performance of a discus-athlete. Various types of joint actions and muscular actions can take place once when the movement is executed by the athlete. As an example, a discus-thrower usually activates the horizontal abduction and the horizontal adduction during the preparation or execution phases of his/her throw. The ground contact of the discus-thrower is very important as it keeps the thrower’s center of gravity station within his/her strongest point of contact thus maintaining his/her balance. The pronation of the contact-foot is actually a combined set of movements consisting of the dorsiflexion at the angle joint, eversion in the tarsals and abduction in the ulna. A restriction of the rotation