Hydration Status And Sweat Electrolyte Loss In Adolescent Judokas Training In Hot And Humid Conditions

Under all but the most extreme environmental heat conditions, children control their body temperature (at rest and during exercise) as well as adults. Children, however, use a different thermoregulatory strategy. Compared with adults, children rely more on dry heat dissipation and less on evaporative cooling (sweating). Their larger skin surface-area relative to mass does put children at increasing disadvantage, relative to adults, as ambient temperatures rise above skin temperature. Similarly, they become increasingly disadvantaged upon exposure to decreasing temperatures below the thermo-neutral zone. Like adults, children inadvertently dehydrate while exercising in hot conditions and are often hypohydrated, even before exercise, and their core temperature rises considerably more than adults in response to a given fluid (sweat) loss, which may put them at higher risk for heat-related injury. However, epidemiological data show rates of both heat- and cold-related injuries among children and adolescents as similar or lower than at any other age.

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Temperature regulation

Falk¹,

Dotan²

2008

Paediatric Exercise Science and Medicine

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This chapter outlines the physical and physiological changes that occur during growth and maturation and the possible effects these changes can have on the nature and effectiveness of thermoregulation. The physiological responses to heat stress are discussed in terms of metabolic, circulatory, hormonal, and sweating responses, changes in body temperature, and in terms of heat tolerance. Also discussed is hydration status, which can affect thermoregulatory effectiveness in the heat. The physiological response to cold stress is considered in terms of the metabolic and circulatory responses and their possible influence on the effectiveness of thermoregulation. The discussion does not outline the thermoregulatory response per se, but rather emphasizes the differences in that response between children and adults. Finally, child–adult differences in the acclimatization- and training-induced adaptations to thermal stress are discussed.

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Hydration Status And Sweat Electrolyte Loss In Adolescent Judokas Training In Hot And Humid Conditions

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Physiologic and Health Aspects of Exercise in Hot and Cold Environments

Physiologic and Health Aspects of Exercise in Hot and Cold Environments

Temperature regulation

Temperature regulation

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