ESSENTIAL FITNESS

As we know athletes move throughout the world for their competition and training sessions. So they are encounterd by cold weather also and have to manage the risk of hypothermia because Cold weather facilitates the loss of body heat which can reduce body temperature. But it can managed by heat conservation or by increased heat production. Exercise and shivering increase metabolic heat production helping to offset body heat losses in the cold. Exercise increases peripheral blood flow facilitating heatloss, an effect that can persist for some time after exercise ceases. Prolonged exercises may lead to energy substrate depletion which compromise the maintenance of thermal balance during cold. The heat transfer coefficient is mainly influenced by ambient temprature, wind chill and clothing, when vasoconstrictor responses to cold are impaired body heat conservation declines. Chronic exertion impairs temperature control, when heavy physical activity in the cold is coupled with underfeedin