Match the vocabulary item with the correct definition. 1. a sensory organ in the muscles that relaxes them in response to static stretching 2. stretching that involves no movement during the muscle stretch 3. a sensory organ in the muscles that tightens them in response to sudden movement 4. stretching which involves gentle, sports-related motions 5. stretching which involves forceful bouncing movements 6. pairs of muscles that move parts of the body in opposite directions antagonistic muscles ballistic stretching dynamic stretching golgi tendon organ muscle spindle static stretching