Metabolic Habituation Following Repeated Resting Cold-Water Immersion Is Not Apparent During Low-Intensity Cold-Water Exercise

概要

論文の詳細を見る
This project examined the effects of repeated, resting cold-water immersion on metabolic heat production and core temperature defence during subsequent rest and exercising immersions. Seven males undertook 15 days of cold-water adaptation, immersed to the fourth intercostal space, with cold-water stress tests (CWST) on days 1, 8 and 15(18.1 SD 0.1℃ : 60 min seated, followed by 30 min cycling(1 W・kg^<-1>)), and 90-min resting immersions (18.4 SD 0.4℃) on each of the intervening days. Adaptation elicited an habituated thermogenic response during the rest phase of CWST3 beyond 20 min, compared to CWST1(P<0.05), with oxygen consumption averaging 11.15(±0.25)ml・kg^<-1>・min^<-1> and 8.61(±0.90)ml・kg^<-1>・min^<-1> by 50 min, for CWST1 and CWST3, respectively. During exercise, this metabolic blunting was only apparent over the first 10-min period (60-70 min). No significant differences were observed during either the rest or exercise phases of the CWSTs for oesophageal temperature (T_<es>). While repeated cold-water exposures produced an habituated-thermogenic response, for an equivalent drop in T_<es> during rest, neither this response, nor an elevated thermogenesis, were apparent during subsequent cold-water exercise.
日本生理人類学会の論文