How do humans control physiological strain during strenuous endurance exercise?
<h4>Background</h4>Distance running performance is a viable model of human locomotion.<h4>Methodology/principal findings</h4>To evaluate the physiologic strain during competitions ranging from 5-100 km, we evaluated heart rate (HR) records of competitive runners (n = 211). We...
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| Autores principales: | , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Public Library of Science (PLoS)
2008
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/952a04e7952840239c3ece45ccc055ac |
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| Sumario: | <h4>Background</h4>Distance running performance is a viable model of human locomotion.<h4>Methodology/principal findings</h4>To evaluate the physiologic strain during competitions ranging from 5-100 km, we evaluated heart rate (HR) records of competitive runners (n = 211). We found evidence that: 1) physiologic strain (% of maximum HR (%HRmax)) increased in proportional manner relative to distance completed, and was regulated by variations in running pace; 2) the %HRmax achieved decreased with relative distance; 3) slower runners had similar %HRmax response within a racing distance compared to faster runners, and despite differences in pace, the profile of %HRmax during a race was very similar in runners of differing ability; and 4) in cases where there was a discontinuity in the running performance, there was evidence that physiologic effort was maintained for some time even after the pace had decreased.<h4>Conclusions/significance</h4>The overall results suggest that athletes are actively regulating their relative physiologic strain during competition, although there is evidence of poor regulation in the case of competitive failures. |
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