What is another name for the range of motion in your joints?

Movement or flexibility

Explanation: healthy body that should stay free of injuries as long as possible, flexibility plays and important part. Flexibility is the absolute RANGE of movement in a join or a series of joints and lengthen muscles that cross the joints to induce a bending movement or motion. Flexibility is mostly trained with passive stretches, working with exercise which move your joints actively improves flexibility and strengthens you at the same time  

not b. i am not sure what it is but not b