Physiological Benefits:
Pain Control: inhibition of nociception, decrease swelling, release endorphins and enkephalins
Circulation: increase venous flow, dilation of cutaneous capillaries, increase blood flow, remove metabolic waste products, local release of vasodilators, reduce blood pressure
Lymphatic System: increase lymphatic flow, reduce edema, lower the chance of scar formation.
Musculoskeletal System: increase range of motion, decrease muscle spasm,decrease trigger points,decrease fibrosis and adhesions, increase resting length of muscles
Respiratory Function: improve respiratory function by loosening mucus and improving clearance of sputnum, increase chest expansion, increase vital capacity, decrease stress in asthmatics
Immune System: reduce stress, improve immune function

Psychological Effects:
Reduce stress, anxiety, depression.  Creates feelings of well-being and relaxation.