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| Content Provider | Springer Nature Link |
|---|---|
| Author | Buo, Michael J. Wall, Anthony J. |
| Copyright Year | 2000 |
| Abstract | The purpose of this study was to compare directly the physiological consequences of 5% hypohydration or euhydration during exercise in both temperate (23 °C) and hot (33 °C) environments. The subjects were eight male volunteers. Each performed four 1-h exercise bouts at 60% maximum oxygen uptake, one in each of the following conditions: hot-hypohydrated, hot-euhydrated, temperate-hypohydrated, and temperate-euhydrated. Heart rate (HR), rectal temperature (T re), forearm blood flow, and oxygen uptake were measured after 20, 40, and 60 min exercise. Whole-body sweat rate was also determined for each exercise bout. Hypohydration increased T re significantly (P<0.05) more in the hot environment (0.16 °C per 1% decrease in body mass) than in the temperate environment (0.08 °C per 1% hypohydration). Furthermore, compared with euhydration, hypohydration decreased forearm blood flow and whole-body sweat rate significantly more during exercise in the hot than in the temperate environment. The reductions in forearm blood flow and whole-body sweat rate appear to have decreased heat loss, thus accounting for the increase in T re during exercise in the heat while hypohydrated. In conclusion, this study illustrates that the physiological consequences of hypohydration during exercise are exacerbated in the heat. |
| Starting Page | 476 |
| Ending Page | 480 |
| Page Count | 5 |
| File Format | |
| ISSN | 00316768 |
| Journal | Pflügers Archiv |
| Volume Number | 440 |
| Issue Number | 3 |
| e-ISSN | 14322013 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2000-04-29 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Physiology (medical) Clinical Biochemistry |
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