Chapter 2Lesson 2

Environmental Conditions and Physical ActivityClimate is a potential factor in personal health and fitness especially for people who are physically active or play sports.

Extreme Heat and Fluid BalanceDuring physical activity your body produces heat that causes your body temperature to rise above normal. To prevent overheating your body perspires which cools your body down. Fluid Balance – The body's ability to balance the amounts of fluid taken in with the amounts lost through perspiration or excretion. Dehydration – Body fluid loss

Heat Cramps Muscle spasms resulting from the loss of large amounts of salt and water through perspiration.Heat ExhaustionAn overeating of the body resulting from cold clammy skin and symptoms of shock.Heat strokeA condition in which the body can no longer rid itself of heat through perspiration.

How To Avoid Heat Related InjuryAcclimatizationAllowing your body to adapt slowly to weather conditions.Fluid IntakeRehydrateRestore lost waterClothingChoose lightweight materials such as cotton fabrics loose fitting and light in color.Heat stress indexA scientific measure of the combined effects of heat and humidity on the body.

Physical Activity in Extreme ColdHypothermiaA condition in which your body temperature drops below normal. FrostbiteTissue damaged from freezing.Wind Chill FactorCombined influence of wind and temperature on the body.