Consequences of rising humidity level on circulatory responses during prolonged intense exercise

Abstract

The demand on the circulatory system to supply adequate oxygenated blood to the working muscle during exercise is further challenged in heat stress condition (Gonzalez-Alanso, 2008). The circulatory system will have to meet the dual demand of supplying adequate oxygenated blood to the working muscle and thermoregulatory demand of increased skin blood flow when exercising in heat stress condition (Thompson, 2006; Gonzalez-Alanso et al., 2008). These combined demands for blood flow may result in competition for available cardiac output, which ultimately influence exercise performance.