A relaxation massage will use several of the Sweedish massage techniques specifically designed to relax muscles by applying pressure to them against deeper muscles and bones, and rubbing in the same direction as the flow of blood returning to the heart. It involves the use of kneading, stroking, friction, tapping, and vibration and may provide relief from stiffness, numbness, pain, constipation, and other health problems. The main purpose of Swedish massage is to increase the oxygen flow in the blood, release toxins from the muscles and bring a sense of total relaxation. Other possible benefits include stimulation of circulation, an increase in muscle tone, and a balance of the musculo-skeletal systems. Swedish massage shortens recovery time from muscular strain by flushing the tissues of lactic acid, uric acid, and other metabolic wastes. It increases circulation without increasing heart load.