Ice Cooling Vest on Tolerance for Exercise under Uncompensable Heat Stress
| Autor: | Andrew R. Schissler, Jill M. Stapleton, Konrad Binder, Glen P. Kenny, Stephen G. Hardcastle, Matthew Piamonte, Christopher Q. Lan, Aaron Lynn |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Adult
Male Miles per hour Heat Stress Disorders Exercise time Body Temperature Young Adult Animal science Protective Clothing Heart Rate Task Performance and Analysis Heart rate Humans Medicine Thermosensing Exercise physiology Treadmill Exercise Simulation Exercise Tolerance business.industry Ice Public Health Environmental and Occupational Health Thermoregulation Heat stress Cold Temperature Exercise Test VEST business human activities Body Temperature Regulation |
| Zdroj: | Journal of Occupational and Environmental Hygiene. 8:484-491 |
| ISSN: | 1545-9632 1545-9624 |
| DOI: | 10.1080/15459624.2011.596043 |
| Popis: | This study was conducted to evaluate the effectiveness of a commercial, personal ice cooling vest on tolerance for exercise in hot (35°C), wet (65% relative humidity) conditions with a nuclear biological chemical suit (NBC). On three separate occasions, 10 male volunteers walked on a treadmill at 3 miles per hour and 2% incline while (a) seminude (denoted CON), (b) dressed with a nuclear, biological, chemical (NBC) suit with an ice vest (V) worn under the suit (denoted NBCwV); or (c) dressed with an NBC suit but without an ice vest (V) (denoted NBCwoV). Participants exercised for 120 min or until volitional fatigue, or esophageal temperature reached 39.5°C. Esophageal temperature (T(es)), heart rate (HR), thermal sensation, and ratings of perceived exertion were measured. Exercise time was significantly greater in CON compared with both NBCwoV and NBCwV (p0.05), whereas T(es), thermal sensation, heart rate, and rate of perceived exertion were lower (p0.05). Wearing the ice vest increased exercise time (NBCwoV, 103.6 ± 7.0 min; NBCwV, 115.9 ± 4.1 min) and reduced the level of thermal strain, as evidenced by a lower T(es) at end-exercise (NBCwoV, 39.03 ± 0.13°C; NBCwV, 38.74 ± 0.13°C) and reduced thermal sensation (NBCwoV, 6.4 ± 0.4; NBCwV, 4.8 ± 0.6). This was paralleled by a decrease in rate of perceived exertion (NBCwoV, 14.7 ± 1.6; NBCwV, 12.4 ± 1.6) (p0.05) and heat rate (NBCwoV, 169 ± 6; NBCwV, 159 ± 7) (p0.05). We show that a commercially available cooling vest can significantly reduce the level of thermal strain during work performed in hot environments. |
| Databáze: | OpenAIRE |
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