Mov 470 Ch 7 Environmental Factors

Ventilation as and bp fall reflex response shivering

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Unformatted text preview: ill of oxygen of As deep body temp drops, HR ventilation As and BP fall (reflex response-shivering) and Facial exposure to cold winds and whole Facial body exposure might precipitate angina (chest pains) in an individual with CHD Cold Acclimation Cold Acclimation alterations establish over days Acclimation or weeks in response, can be passed down over generations to promote survial in hostile environments hostile Takes about 11 days – Wont acclimate with limited exposure – Genetic’s can play a part in acclimation Metabolic patter of cold adaptation: Metabolic Prolonged periods with significant heat loss, but with increased body heat production Exercise Testing & Prescription in the Cold in When low temps are combined with wind When speed convection heat losses are magnified magnified Fatigue reduces exercise intensity thus Fatigue increasing chances of hypothermia increasing The WCI Index? – Wind Chill Index Cold & Special Populations Cold During cold exposure, exercise could further During increase the work of the heart through added myocardial oxygen requirements added The cold pressor test: – Put their hand in cold water and see how long it Put takes them to pull out takes Breathing cold air decreases mucociliary Breathing clearance producing airway congestion increasing the difficulty of any exercise bout increasing High Altitude Exposure Most prominent adaptation to acute high altitude is increased pulmonary ventilation at any given exercise oxygen uptake – Increased blood ph – And the bod...
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This note was uploaded on 05/29/2011 for the course MOV 470 taught by Professor Crawley during the Spring '11 term at Grand Valley State University.

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