周期的低圧常酸素環境への曝露が生理学的指標および競泳のパフォーマンスに及ぼす影響
Year: 2024
Type: article
Abstract: The purpose of this study was to (1) determine the effects of staying in PHNC during the recovery period after supramaximal exercise on oxygen uptake (VO₂), HR and blood lactate (La). (2) To determine the effect of PHNE intervention on performance and skin temperature in the post-training period. Experiment (1) : Seven healthy male athletes (23±5 yrs, 173±6 cm, 79±15 kg) participated in this study. All tests were conducted by an electromagnetically braked cycle ergometer, and PHNE was an environment that repeats cycles of decompression (Atmospheric pressure : approximately 670mmHg) in 3 minutes and abdominal pressure (Atmospheric pressure : approximately 730mmHg) in 3 minutes. At first, subjects had been measured the maximal oxygen uptake (VO₂max). Secondly, supramaximal constant exercise are performed at 115%VO₂max of 1min, and the rest after two different conditions of 60min recovery (NN vs. PHNE). Experiment (2) : Ten male and female competitive swimmers were included in the study (PHNE group : 5, CON group : 5). Both groups had the same training menu, and the PHNE group was exposed to PHNE at rest for 1 hour after the end of training. Surface skin temperature was also measured and recorded before and after the intervention for the PHNE group. Performance was based on 8 target matches that were between December 2016 and May 2017. The results of each match were calculated as a percentage of their personal best through November 2016 (performance index). During the exercise, there was no significantly difference in VO₂ in two conditions. VE, HR and La no differences in two conditions during recovery period. On the other hand in PHNE condition, VO₂ and a time constant were higher, and VE/VO₂ and R were lower compared to NN condition. Improvement of ventilation efficiency and promotion of a fat metabolism might be suggested by staying at PHNE. PHNE exposure had no influence on blood lactic acid accumulations. Hyperfunctions of VO₂ and fat metabolism might be suggested by exposuring PHNE during recovery period after one minute supramaximal exercise bout. It is also possible that PHNE intervention between training sessions may promote recovery and consistent performance.
Language: Japanese
Subfield: Orthopedics and Sports Medicine
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W7207899443