Following a relaxing massage, heat is applied 13-year-old
Sebastian's elbow before stretching exercises.

Heat increases blood flow, and is used when we want to increase circulation. Heat may be used to help loosen an area where the muscle has become stiff and tight prior to massage and stretching. Head can be used prior to an activity to warm-up and loosen the muscles.

Cold decreases blood flow, reduces swelling, and can relieve pain by desensitizing nerve endings. Cold is often used immediately following an acute injury, and after exercise.