Mov 470 Ch 7 Environmental Factors

Mov 470 ch 7 environmental factors

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Unformatted text preview: Environmental Factors for Exercise Testing & Prescription Prescription (Part 1) Chapter 7 Both exercise and environment (heat, cold, Both altitude, and air quality) alter the physiologic responses of the cardiorespiratory system responses These environmental factors, either singly These or in combination with exercise, can result in potentially hazardous health conditions potentially Temperature Regulation Temperature Humans are tropical animals – We are more adapted to a more heat We environment Physical exercise dramatically alters the Physical rate of metabolic energy (heat) production with resultant physiologic adjustments for heat loss heat Three major physical avenues of heat loss Three – Radiation Radiation Steady state core temp. increases in Steady proportion to metabolic rate during exercise proportion Relative exercise intensity is an important Relative factor when prescribing exercise factor The relative contributions of dry and The evaporative heat exchange to total heat loss vary with climate conditions Human Physiologic Response to Heat Response Two primary physiological responses Two against overheating: against – Skin blood flow – sweating Exercise induced heat exhaustion – Increase water intake (every 20 min) – Avoid sudden postural changes (especially Avoid elderly or prego’s) elderly Heat cramps & Salt depletion Heat Heat Acclimation Heat Physiological improvements are dramatic Physiological during the first 4 days of exposure and acclimation is virtually complete after 10 days da...
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