Recreational SCUBA diving exposes individuals to environmental stresses not often encountered in other types of activity. These stresses include increased ambient pressure, raised partial pressure of O(2), increased resistance to movement, added weight and drag of diving equipment, cold stress, and a higher breathing resistance. One means to understand how such stresses affect a diver is to employ the stress-strain-adaptive response model.
View Article and Find Full Text PDFMed Sci Sports Exerc
January 1994
To determine if drinking fluid altered exercise and thermal variables during 2-h immersions in 25 degrees C water, 11 male subjects were tested breathing air at 1 ATA and HeO2 at 5.5 ATA (PO2 = 0.42 ATA).
View Article and Find Full Text PDFAviat Space Environ Med
August 1992
The efficacy of self-induced post-hypnotic suggestion to improve thermogenic responses to head-out immersion in 25 degrees C water was evaluated in 12 males. An on-line computerized system permitted the change in body heat storage to be used as the independent variable and immersion time as the dependent variable. Test-retest reliability was good, exhibiting a coefficient of variation of less than 5% for exposure time.
View Article and Find Full Text PDFRecreational and job requirements have increased the incidence in which humans exercise in cold environment. Understanding the physiological responses while exposed to cold entails knowledge of how exercise and cold interact on metabolic, cardiopulmonary, muscle and thermal aspects of human performance. Where possible, distinction are made between responses in cold air and cold water.
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April 1991
Ten males exercised for 55 min at 1.5 W.kg-1 in 28 degrees C and 18 degrees C water to determine whether cold water plus caffeine (CF) ingestion had additive effects on energy production or core temperature.
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