Under Question B, for parts a-e, approximately what muscles are used for each ac
ID: 3510782 • Letter: U
Question
Under Question B, for parts a-e, approximately what muscles are used for each activity?
1. Sketches of positions can be found at http//www.slideshare net natjkeen biomechanics-labs B. Throw from the following positions: a. The thrower takes a long sitting position with their back against a wall. The b. Move one meter away from the wall. The thrower should remain in a long c. Move two meters away from the wall. Stand square to the direction of the t up must remain against the wall. Throw the ball using arm only position. Rotate the shoulders and arm back as far as possible. Do not lean back Throw the ball using the arms and shoulders only. Rotate the hips and shoulder as far back as possible The feet must remain in contact with the ground and must not twist around. Throw the ball using the hips, shoulders and arm only Stay two meters away from the wall. Stand side on to the direction of the throw, with the feet shoulder width apart and the back knee straight. Rotate the trunk as far back as comfortable. Throw the ball using the hips, shoulders and arm, but make sure the body weight has been transferred before the arm begins to move. In order that forces can be effectively applied, this leg should stop or stabilize before the forward arm swing. Repeat position "d", but now step forward and throw the ball. The back foot should be free to move or slide. d. e. 35Explanation / Answer
a] The flexors, extensors and triceps help to move the arm while throwing the ball. The wrist flexors-- the carpi radialis, carpi ulnaris , digitorum superficialis and pollicis longus , which are on the front of the forearms give the thrust to the ball.
b] When you use your arms and shoulders to throw the ball, the shoulder joints are also used as you raise your arms to throw the ball. The shoulder flexors help to raise the arm and the shoulder extensors give the power to the arm. The anterior deltoid, pectoralis major and the coracobrachialis give the thrust to the arm. The lattisimus dorsi, pectoralis major and the teres muscle give the power and the triceps support elbow movement.
c] The gluteus muscle will keep the pelvic stable, preventing a fall. The muscles of the arm and shoulder will be as above.
d] For this posture, the anterior muscle group of the hip region will be involved. The abductor muscle group , which are located on the lateral side of the thigh , will be used when the legs are moved apart and the body is twisted at the hip.
e] Now the adductor muscle group , also known as the groin muscles, will be involved as the back foot is free to move or slide.Strong contractions in the posterior muscle group [ gluteus maximus, biceps femoris] will help to extend the thigh and hence the leg.
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