How does heat affect the muscles?

The use of heat therapy (e.g., through a “hot roll” or fango treatments) has a positive effect on motor functions. Against this background, the prescription of heat therapy is very often a regular part of physical therapy. Physiologically, the application of heat is associated with improved blood flow to the muscles, which in turn leads to increased oxygen delivery to the active muscles and the removal of metabolic waste products.

In addition to its positive effect on blood circulation, heat is known to reduce muscle tone. “Muscle tone” refers to the degree of muscle tension. The muscle-tone-reducing effect of heat is of particular therapeutic importance in cases of spasticity. Targeted heat application can reduce muscle tension in spastic muscles. Thus, heat therapy is an important component of spasticity treatment, which includes medication, physical therapy, and the use of therapeutic exercise equipment.

Like any medical treatment, heat therapy also requires an individualized medical decision regarding its use, as it can also be associated with side effects (e.g., due to strain on the circulatory system).