文章基本信息

标题：Effects of Dietary Nitrate Supplementation on Performance and Muscle Oxygenation during Resistance Exercise in Men
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作者：Rachel Tan ; Adam Pennell ; Katherine M. Price 等
期刊名称：Nutrients
电子版ISSN：2072-6643
出版年度：2022
卷号：14
期号：18
DOI：10.3390/nu14183703
语种：English
出版社：MDPI Publishing
摘要：The purpose of the current study was to assess the effects of acute and short-term nitrate (NO 3 −)-rich beetroot juice (BR) supplementation on performance outcomes and muscle oxygenation during bench press and back squat exercise. Fourteen recreationally active males were assigned in a randomized, double-blind, crossover design to supplement for 4 days in two conditions: (1) NO 3 −-depleted beetroot juice (PL; 0.10 mmol NO 3 − per day) and (2) BR (11.8 mmol NO 3 − per day). On days 1 and 4 of the supplementation periods, participants completed 2 sets of 2 × 70%1RM interspersed by 2 min of recovery, followed by one set of repetitions-to-failure (RTF) at 60%1RM for the determination of muscular power, velocity, and endurance. Quadriceps and pectoralis major tissue saturation index (TSI) were measured throughout exercise. Plasma [NO 3 −] and nitrite ([NO 2 −]) were higher after 1 and 4 days of supplementation with BR compared to PL ( p < 0.05). Quadriceps and pectoralis major TSI were not different between conditions ( p > 0.05). The number of RTF in bench press was 5% greater after acute BR ingestion compared to PL (PL: 23 ± 4 vs. BR: 24 ± 5, p < 0.05). There were no differences between BR and PL for RTF for back squat or power and velocity for back squat or bench press ( p > 0.05). These data improve understanding on the ergogenic potential of BR supplementation during resistance exercise.
关键词：ennitric oxideweightliftingbeetrootneuromuscular