Physical exercise-induced thermoregulatory responses in trained rats: Effects of manipulating the duration and intensity of aerobic training sessions
| Autor: | Danusa Dias Soares, Samuel Penna Wanner, Washington Pires, Filipe Ferreira Vaz, Nicolas Henrique Santos Barbosa, Francisco Teixeira-Coelho, Cletiana Gonçalves Fonseca |
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| Přispěvatelé: | Human Physiology and Sports Physiotherapy Research Group, Physiotherapy, Human Physiology and Anatomy |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Male Physiology 030310 physiology Physical exercise 010603 evolutionary biology 01 natural sciences Biochemistry Incremental exercise 03 medical and health sciences Physical Conditioning Animal/physiology Physical Conditioning Animal Aerobic exercise Medicine Animals Treadmill Rats Wistar 0303 health sciences Core (anatomy) business.industry Temperature Thermoregulation Intensity (physics) Anesthesia Exercise intensity Body Temperature Regulation/physiology General Agricultural and Biological Sciences business Developmental Biology Body Temperature Regulation |
| Zdroj: | Journal of thermal biology. 97 |
| ISSN: | 0306-4565 |
| Popis: | This study investigated the effects of increasing the intensity and/or duration of aerobic training sessions on thermoregulatory responses in rats subjected to exercises in temperate and warm environments. Thirty-two adult male Wistar rats were divided into four groups: a control (CON) group and three groups that were subjected to an 8-week aerobic training, during which the physical overload was achieved by predominantly increasing the exercise intensity (INT), duration (DUR) or by increasing both in an alternate manner (ID). During the last week of training, the rats received an abdominal sensor implant to measure their core body temperature (TCORE) by telemetry. After the training protocol, the 32 rats were subjected to incremental speed-exercises in temperate (23 °C) and warm (32 °C) environments. The rats had their TCORE recorded while running on a treadmill, and the ratio between the increase in TCORE and distance traveled was calculated to estimate thermoregulatory efficiency. All training protocols increased the rats’ thermoregulatory efficiency during the incremental-speed exercise at 23 °C; i.e., trained rats attained faster running speeds but unchanged TCORE at fatigue compared to CON rats. However, none of the load components of training sessions – intensity or duration – was more effective than the other in improving this efficiency. At 32 °C, the aerobic training protocols did not influence the exercise-induced thermoregulatory responses. Our data indicate that different progressions in aerobic training performed at temperate conditions improved thermoregulatory efficiency during incremental exercise in the same environment; this training-induced adaptation was not clearly observed when running in warmer conditions. |
| Databáze: | OpenAIRE |
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