학술논문
The Acute Effects of a Single Dose of Molecular Hydrogen Supplements on Responses to Ergogenic Adjustments during High-Intensity Intermittent Exercise in Humans.
Document Type
Academic Journal
Author
Alharbi AAD; Graduate School of Health and Sports Science, Doshisha University, Kyoto 610-0396, Japan.; Iwamoto N; Graduate School of Health and Sports Science, Doshisha University, Kyoto 610-0396, Japan.; Ebine N; Graduate School of Health and Sports Science, Doshisha University, Kyoto 610-0396, Japan.; Nakae S; Human Augmentation Research Center, National Institute of Advanced Industrial Science and Technology, Kashiwa II Campus, The University of Tokyo, Chiba 277-0882, Japan.; Hojo T; Graduate School of Health and Sports Science, Doshisha University, Kyoto 610-0396, Japan.; Fukuoka Y; Graduate School of Health and Sports Science, Doshisha University, Kyoto 610-0396, Japan.
Source
Publisher: MDPI Publishing Country of Publication: Switzerland NLM ID: 101521595 Publication Model: Electronic Cited Medium: Internet ISSN: 2072-6643 (Electronic) Linking ISSN: 20726643 NLM ISO Abbreviation: Nutrients Subsets: MEDLINE
Subject
Language
English
Abstract
This research examined the effects of single-dose molecular hydrogen (H 2 ) supplements on acid-base status and local muscle deoxygenation during rest, high-intensity intermittent training (HIIT) performance, and recovery. Ten healthy, trained subjects in a randomized, double-blind, crossover design received H 2 -rich calcium powder (HCP) (1500 mg, containing 2.544 μg of H 2 ) or H 2 -depleted placebo (1500 mg) supplements 1 h pre-exercise. They performed six bouts of 7 s all-out pedaling (HIIT) at 7.5% of body weight separated by 40 s pedaling intervals, followed by a recovery period. Blood gases' pH, PCO 2 , and HCO 3 - concentrations were measured at rest. Muscle deoxygenation (deoxy[Hb + Mb]) and tissue O 2 saturation (S t O 2 ) were determined via time-resolved near-infrared spectroscopy in the vastus lateralis ( VL ) and rectus femoris ( RF ) muscles from rest to recovery. At rest, the HCP group had significantly higher PCO 2 and HCO 3 - concentrations and a slight tendency toward acidosis. During exercise, the first HIIT bout's peak power was significantly higher in HCP (839 ± 112 W) vs. Placebo (816 ± 108 W, p = 0.001), and HCP had a notable effect on significantly increased deoxy[Hb + Mb] concentration during HIIT exercise, despite no differences in heart rate response. The HCP group showed significantly greater O 2 extraction in VL and microvascular (Hb) volume in RF during HIIT exercise. The HIIT exercise provided significantly improved blood flow and muscle reoxygenation rates in both the RF and VL during passive recovery compared to rest in all groups. The HCP supplement might exert ergogenic effects on high-intensity exercise and prove advantageous for improving anaerobic HIIT exercise performance.