| Título | Three weeks of passive and intervallic heat at high temperatures (100?2?C) in a sauna improve acclimation to external heat (42?2?C) in untrained males |
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| Autores | Perez-Quintero, M. , SIQUIER COLL, JESÚS, Bartolome, I , Robles-Gil, M. C. , Munoz, D. , Maynar-Marino, M. |
| Publicación externa | Si |
| Medio | J. Therm. Biol. |
| Alcance | Article |
| Naturaleza | Científica |
| Cuartil JCR | 1 |
| Cuartil SJR | 1 |
| Impacto JCR | 3.189 |
| Impacto SJR | 0.644 |
| Fecha de publicacion | 01/02/2021 |
| ISI | 000640910400007 |
| DOI | 10.1016/j.jtherbio.2021.102837 |
| Abstract | Currently, the effect of passive heat acclimation on aerobic performance is still controversial. Therefore, this study aimed to observe the effect of passive and intervallic exposure to high temperatures (100 ? 2 ?C) in untrained males.\n & nbsp; & nbsp; & nbsp;Forty healthy untrained men participated in this investigation. They were randomised into a Control Group (CG; n = 18) and an Experimental Group (EG; n = 22). Both groups performed maximum incremental tests until exhaustion in normothermia (GXT1; 22 ? 2 ?C), and 48h afterwards, in hyperthermia (GXT2; 42 ? 2 ?C). The EG performed 9 sessions of intervallic exposure to heat (100 ? 2 ?C) over 3 weeks. Subsequently, both groups performed two maximal incremental trials in normothermia (GXT3; 22 ? 2 ?C) and 48h later, in hyperthermia (GXT4; 42 ? 2 ?C). In each test, the maximal ergospirometric parameters and the aerobic (VT1), anaerobic (VT2) and recovery ventilatory thresholds were recorded. The Wilcoxon Test was used for intra-group comparisons and the Mann-Whitney U for inter-group comparisons.\n There were improvements in absolute VO2max (p = 0.049), W (p = 0.005) and O2pulse (p = 0.006) in hyperthermia. In VT1 there was an increase in W (p = 0.046), in VO2 in absolute (p = 0.025) and relative (p = 0.013) values, O2pulse (p = 0.006) and VE (p = 0.028) in hyperthermia. While W increased in hyperthermia (p = 0.022) at VT2.\n & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp;The results suggest that passive and intervallic acclimation at high temperatures improves performance in hyperthermia. This protocol could be implemented in athletes when they have to compete in hot environments. |
| Palabras clave | Heat stress; Passive heat acclimation; VO2max; VT1; VT2 |
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