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12. Newton's third law of motion deals with force and its relationship to mass and acceleration. True False 13. A high development of the agonist-antagonist function is essential to the development of dynamic balance. 14. The hamstrings muscles are two-joint muscles that act at the knee and ankle.
15. Given certain constraints, strength is our ability to contract our muscles with maximum force. 16. The Valsalva maneuver involves expiring against a closed glottis and, when combined with contracting muscles of the abdomen and ribcage, creates rigidity in the entire torso. True False 17. The term "anaerobic" indicates the presence of oxygen. 18. Cross training utilizes one mode of training to develop a specific component of fitness. 19. The Golgi tendon organ detects the magnitude of mechanical stress at the musculotendinous junction. 20. Decreased temperature helps to facilitate increases in ROM. True False 21. BMI stands for basal metabolic rate.