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Range of Motion

The range, measured in degrees of a circle, through which a joint can be flexed and extended. Active range of motion: Voluntarily moving a joint through a controlled range of motion; active movement of a joint. Passive range of motion: Having an external force move a joint through its range of motion.

Reciprocal Inhibition

The concept of muscle inhibition caused by a tight agonist, which inhibits its functional antagonist.

Repetition

The act of repeating an action/ movement.

Resting Heart Rate

A measure of heat beats per minute when the body is completely at rest, such as in the morning right out of bed.

Rotation

Exercises or trunk movements performed in the transverse plane, around a longitudinal axis, to the left or right.