TYPES OF MUSCLE CONTRACTION When a muscle contracts it does so in ____main ways: 1.ISOMETRIC CONTRACTION
• Here the muscle stays the same ____________ as it works. • As a result there is ____ movement. • The muscles in the _______ work this way maintaining our posture. 1. What does the picture show? __________________________________________________________________ __________________________________________________________________ 2. Name two other ways in which the muscles work using isometric contractions. __________________________________________________________________ __________________________________________________________________
2.ISOTONIC CONTRACTION
• Here the muscle changes its _________ as it works. • The shortening is called _________________________. 1. What movement and muscular actions are shown in the photograph? • The lengthening under tension is called __________________________________________________________________ ________________________________________________________ _________________________. • The muscles in the arms work this way 2. Name two other activities in P.E. in which the muscles work using isotonic when undertaking a biceps curl.
contractions.________________________________________________________ __________________________________________________________________