Kinesiology 2236A/B Lecture Notes - Lecture 21: Heat Cramps, Heat Syncope, Heat Exhaustion
2 Jan 2018
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Temperature: as atmospheric temperature increases, the temperature gradient between air and body decreases, when tbody > tenviron we lose heat via radiation, over 27 c (80 f) the body absorbs heat. = tbody: we must take the humidity into consideration, substantial humidity, even at low temperatures can be dangerous. Traditional heat definitions: heat cramps, modern hypothesis: alterations in spinal cord reflex activity secondary to fatigue, heat or hydration not the issue, heat syncope. Primary (hard signs: conscious, alert, temp < 40 c, systolic < 100mmhg. Secondary (soft signs)- may or may not be present: sweating, pale, moist, cool skin, cramping, nausea. Irrational behaviour: temp > 40 c, systolic > 100mmhg. Secondary: no sweat, hot, dry skin, weakness/flaccid, nausea. Number and duration of football practice sessions. 1wk, 80% at 2wk, and 100% at 3wk: physical adaptations will occur during 1-3 weeks of exercise-heat exposure. This is important when faces with the reality of sports situations.
