Impact of Dietary Nitrate Supplementation on Executive Function During Hypoxic Exercise
Dobashi S, Koyama K, Endo J, Kiuchi M, Horiuchi M
High altitude medicine & biology · 8 citations
How it was studied
- Design
- Randomized controlled trial (indexed by PubMed)
- Studied in
- People
- Main outcome
- Health markers and function
- Intake measured by
- Not stated
Who paid for it
- Funding
- Independent funding
- Government
- Japan Society for the Promotion of Science
- Grants
- Japan Society for the Promotion of Science (17J02670)
Based on 1 listed funder(s).
Publication
- Published
- 2019-04-25 · High Alt Med Biol · vol. 20 · issue 2 · pp. 187–191
- Publisher
- Mary Ann Liebert, Inc.
- Cited
- 11 citations · more than 74% of similar papers · 0.8× the field average
- References
- 24 works
- Access
- Paywalled
- Research areas
- Heart Rate Variability and Autonomic Control · Cardiovascular and exercise physiology · High Altitude and Hypoxia
- Keywords
- Hypoxia (environmental), Medicine, Heart rate, Oxygenation, Placebo, Time trial, Anesthesia, Stroop effect, Internal medicine, Respiratory minute volume, Cardiology, Blood pressure, Animal science, Oxygen, Respiratory system, Chemistry, Biology, Cognition
- MeSH
- frontal lobe, humans, beta vulgaris, nitrates, oxygen, hemoglobins, spectroscopy, near-infrared, exercise, cross-over studies, double-blind method, neuropsychological tests, beverages, dietary supplements, male, young adult, executive function, hypoxia
5 authors
From JP
- Shohei DobashiJapan Society for the Promotion of Science; University of Yamanashi
- Katsuhiro KoyamaUniversity of Yamanashi
- Junko EndoMount Fuji Research Institute
- Masataka KiuchiUniversity of Yamanashi
- Masahiro Horiuchi · correspondingMount Fuji Research Institute
Abstract
We investigated the effects of 4-day dietary beetroot (BR) juice supplementation on executive function assessed by color-word Stroop task (CWST) in hypoxia (fraction of inspired oxygen [FiO2] = 0.1395). Eight healthy young men performed 25-minute leg cycling exercise (target heart rate, 140 bpm) randomly with placebo (PL) juice or BR supplementation. The CWST was evaluated at resting hypoxic condition (after 30 minutes of hypoxic exposure) and at 15 minutes during exercise. During exercise, the correct response time in the CWST was significantly shortened compared with those at rest with no differences between PL and BR. The response accuracy in the CWST with BR was marginally lower than that with PL during exercise (p = 0.066). There were no significant differences in all physiological values, including pulmonary ventilation, arterial oxygen saturation, partial pressure of end-tidal carbon dioxide output, and tissue oxygenation in the left frontal lobe, assessed by near-infrared spectroscopy during exercise conditions involving PL and BR supplementation. These results suggest that moderate exercise in hypoxia partially improved executive function; however, 4-day dietary BR supplementation did not improve executive function during hypoxic exercise.
Abstract via Europe PMC. Copyright remains with the authors or publisher.
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