The Effect of Cold Water Immersion and Cold Water Intake on some Physiological Responses and Endurance Time In a Hot Environment

Mohammad F. Abu Mohammad, Sameera M. Orabi

Abstract


The aim of the present study was to examine the effect of cold water immersion and cold water intake on some physiological responses and endurance time in a hot environment. Using a random blind-design, 6 athletes participated in 3 trials (7 days apart). Athletes ran 50 minutes on a treadmill at moderate intensity in a laboratory (34-35°c) (session 1) before 12 min of the break in either cold water immersion/immersion trial, cold water intake/water trial or control trial. After the break, athletes performed an incremental running protocol on a treadmill until fatigue (session 2). Decreased oral temperature, aldosterone concentration, urine specific gravity and elevated heart rate were significantly lower postsession 2 in immersion trial. Oral temperature was significantly lower in water than control trial. There was no significant diference between trials in plasma volume. Endurance/running time was significantly longer in immersion trail than in the other trials (a<0.05). In conclusion, cold water immersion increased endurance time and enhanced physiological responses. The authors recommend using cold water immersion in a hot Olympic games in 2008 in Beijing.


Keywords


Hot Environment, Cold Water Immersion, Urine Specific Gravity.

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