One type of therapy in practice among the athletes today that is gain in popularity is cryotherapy. This combines cryo (which is cooling) with thermo (which is heating) and the physiological changes and effects are quite positive. When a body is cooled, the muscle and subcutaneous temperature drops, the skin decreases and the blood vessels narrow. This serves to dull the effects of pain and reduces the swelling that will occur following an injury, as well as reducing any spasms that may also occur. The heating of the body does just the opposite. Temperature increases, and the blood flows more quickly, bringing nutrients and oxygen to the area that is in jeopardy. The similar effect is that heating the body will also decrease the existence of muscle spasms and cramping. To quickly alternate between the heat and the cooling causes the effect of pumping, increasing the circulation through forced measures.
This kind of therapy has been shown to influence performance on the field, the court or on the stage, in a beneficial manner. The underwater jets in a hot tub, as in the ones found on choosehottubsdirect.com, provide a massage that has been shown to preserve the power in ones muscles for the next days performance. Whereas those athletes that simply rested, had a reduction in power that was significantly inferior. Lactic acid builds after working out or extreme physical activity and is the stuff responsible for sore, stiff muscles. When the muscles are massaged, this acid does not have a chance to build up. Again, when the athletes simply sleep or take it easy, the acid builds up and the muscles become tense. Australian scientists have studied athletes and report that the cry/thermo hydrotherapy following performances, competitions or daily training, provides the athletes with a feeling of freshness mentality and lightness and more relaxed muscle tone. Similarly the lactic acid is disseminated quickly when one alternates the temperatures in the shower, from hot to cold and back again.