Prolonged exercise causes the body’s temperature to increase. The Group Fitness Instructor can provide advice on how to best reduce the ill-effects of overheating, so their class members do not “lose steam,” before the end of class. In order to decrease body heat, the body uses WHICH of the following:
Explanation
Answer: D - The mechanisms used by the body to give off excess heat are radiation, conduction, convection, and evaporation. Radiation is heat loss via the transfer of heat from one object to another, without physical contact. Conduction is the transfer of body heat to the surface of a cooler object. Convection occurs when heat is lost through the air or water in contact with the body. Evaporation causes a decrease in body heat when body heat is transferred from the skin to sweat, which then evaporates. Group Fitness Instructors should provide a properly ventilated room, with moving air currents, and a low humidity. In addition, they should cue participants on proper use of fabrics and styles of clothing to maximize dissipation of heat.
