Effects of hot and humid environments on thermoregulation and aerobic endurance capacity of Laser sailors

Autor: Yixiao Xu, Yongcai Zhao, Binghong Gao
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Journal of Exercise Science & Fitness, Vol 20, Iss 4, Pp 283-290 (2022)
Druh dokumentu: article
ISSN: 1728-869X
DOI: 10.1016/j.jesf.2022.06.003
Popis: Background/Objectives: The purpose was to investigate the effects of hot and humid environments on thermoregulation and aerobic endurance capacity and whether high skin temperature serves as a more important thermoregulatory factor affecting aerobic exercise capacity. Methods: A randomized cross-over design was applied to this study, in which nine Laser sailors performed the 6 km rowing test (6 km test) in both a warm (ambient temperature: 23 ± 1.4 °C; relative humidity: 60.5 ± 0.7%; wind speed: 0 km/h; WARM) and hot environment (ambient temperature: 31.8 ± 1.1 °C; relative humidity: 63.5 ± 4.9%; wind speed: 3.5 ± 0.7 km/h; HOT). Results: The time for completing 6 km test of HOT group was significantly longer than that of WARM group (P = 0.0014). Mean power of 3–4 km, 4–5 km and 5–6 km were significant lower in HOT group (P = 0.014, P = 0.02, P = 0.003). Gastrointestinal temperature and skin temperature were significantly higher in HOT group during the 6 km test (P = 0.016, P = 0.04). Heat storage at 5 min and 15 min of HOT group were significantly higher than that of WARM group (P = 0.0036; P = 0.0018). Heart rate and physiological strain index of HOT group were significantly higher than that of WARM group during the 6 km test (P = 0.01, P
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