Effects on the muscles When muscles work, they need a greater supply of oxygen and more waste products are produced. The waste products can accumulate when the muscles are resting and stiffness results. If muscles are massaged the blood supply is increased. This increased circulation not only feeds the muscle tissue but brings with it oxygen and absorbs the waste products. Muscles are kept in tone and functional power with massage. However it is important to realize the limitations of massage and to understand that nothing can have the same value as active exercise. An athlete will always feel refreshed after great muscular exertion when massaged, as the acceleration of the blood will help to carry away the toxic products formed in the muscles during strenuous exerc1se.