Effects of a single dose of a betalain-rich concentrate on determinants of running performance and recovery muscle blood flow: a randomized, triple-blind, placebo-controlled, crossover trial.

IF 2.7 3区医学 Q2 PHYSIOLOGY European Journal of Applied Physiology Pub Date : 2025-07-01 Epub Date: 2025-02-24 DOI:10.1007/s00421-025-05738-w

Steven Vitti, Michael Bruneau, Leah Bisgrove, Samuel Grey, Sarah Levine, Craig Mattern, Justin Faller

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Abstract

Purpose: This study aimed to examine the effects of a single dose of a betalain-rich concentrate (BRC) on determinants of running performance and recovery lactate clearance.

Methods: In this a randomized, triple-blind, placebo-controlled, crossover trial, 17 male recreational runners (Age: 19.0 ± 1.0 years; Height: 176.8 ± 6.2 cm; Weight: 70.62 ± 8.1 kg; Body fat: 12.8 ± 0.03%; VO_2max: 58.9 ± 8.6 ml/kg/min) consumed an acute dose of a BRC (100 mg) or a placebo (100 mg of dextrose; CON) and performed a running economy protocol (RE) at velocities corresponding to 60% and 80% of maximal oxygen consumption (VO_2max) followed by a VO_2max test. Both exercise and recovery skeletal muscle oxygenation (SmO₂) were assessed via near-infrared spectroscopy (NIRS), and recovery lactate was obtained.

Results: BRC resulted in lower heart rate (HR) at velocities corresponding to 80% of VO_2max (p = 0.05) and maximum HR (HR_max; p = 0.01), and a lower rating of perceived exertion (RPE) at velocities corresponding to 60% of VO_2max (p = 0.02) when compared to CON. BRC also improved post-exercise SmO₂ at 3 (p = 0.05), 4 (p = 0.02), and 5 min (p = 0.01) but not lactate clearance (p > 0.05). BRC did not significantly improve RE or VO_2max (p > 0.05).

Conclusions: A single dose of BRC did not enhance RE or VO_2max. However, the observed improvements in exercise HR, RPE, and SmO₂ suggest that BRC may confer cardiovascular benefits for exercise and recovery.

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单剂量富含β素的浓缩物对跑步表现和恢复肌肉血流量决定因素的影响：一项随机、三盲、安慰剂对照的交叉试验。

目的：本研究旨在研究单剂量富β素浓缩物（BRC）对跑步表现和恢复乳酸清除的决定因素的影响。方法：在这一随机、三盲、安慰剂对照、交叉试验中，17名男性休闲跑步者(年龄：19.0±1.0岁；高度：176.8±6.2 cm；重量：70.62±8.1 kg；体脂：12.8±0.03%；VO2max: 58.9±8.6 ml/kg/min)，服用急性剂量的BRC （100mg）或安慰剂(100mg葡萄糖；在最大耗氧量（VO2max）的60%和80%的速度下进行跑步经济性方案（RE），然后进行VO2max测试。通过近红外光谱（NIRS）评估运动和恢复骨骼肌氧合（SmO2），并获得恢复乳酸。结果：BRC可降低VO2max 80%的心率（p = 0.05）和最大HR (HRmax；p = 0.01)，并且与con相比，在相当于VO2max 60%的速度下的感知运动（RPE）等级较低（p = 0.02）。BRC还改善了运动后3分钟（p = 0.05）， 4分钟（p = 0.02）和5分钟（p = 0.01）时的SmO2，但没有乳酸清除率（p > 0.05）。BRC没有显著提高RE和VO2max （p < 0.05）。结论：单剂量BRC不能提高RE或VO2max。然而，观察到的运动HR、RPE和SmO₂的改善表明BRC可能对运动和恢复的心血管有益。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

European Journal of Applied Physiology 医学-生理学

CiteScore

6.00

自引率

6.70%

发文量

227

审稿时长

3 months

期刊介绍： The European Journal of Applied Physiology (EJAP) aims to promote mechanistic advances in human integrative and translational physiology. Physiology is viewed broadly, having overlapping context with related disciplines such as biomechanics, biochemistry, endocrinology, ergonomics, immunology, motor control, and nutrition. EJAP welcomes studies dealing with physical exercise, training and performance. Studies addressing physiological mechanisms are preferred over descriptive studies. Papers dealing with animal models or pathophysiological conditions are not excluded from consideration, but must be clearly relevant to human physiology.