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If something is painful during exercise, what should you do? a. back off the exercise. b. modify the exercise. c. consult a physician if the pain persists. d. all of the above

Hot5, endomondo, gympact, and runkeeper are popular a.) energy drinks b.) vigorous-intensity exercise c.) fitness apps d.) moderate-intensity exercise e.) fitness tests

Which list shows the correct order of living units, from smallest to largest? 1: bone, osteocyte, periosteum 2: periosteum, bone, osteocyte 3: bone, periosteum, osteocyte 4: osteocyte, periosteum, bone