Overdevest Elvera, Wouters Jeroen A, Wolfs Kevin H M, van Leeuwen Job J M, Possemiers Sam
Team NL Innovation Center, Sportcentrum Papendal, Arnhem, The Netherlands.
BioActor BV, Maastricht, The Netherlands.
J Sports Sci Med. 2018 Mar 1;17(1):24-30. eCollection 2018 Mar.
Previous studies have shown that polyphenol supplementation may be an effective strategy to improve exercise performance, due to their antioxidant character and ability to stimulate NO production. These properties may contribute to exercise performance, yet no conclusive research has been performed in exploring the direct effects of citrus flavonoids on human exercise performance. Therefore, the purpose of this study was to assess whether supplementation of a customized citrus flavonoid (CF) extract for 4 weeks improves cycling time-trial performance in trained male athletes. In a double-blind, randomized, parallel study, 39 healthy, trained males were given a daily dose of either 500 mg of a customized citrus flavonoid extract (CF) or a placebo for 4 weeks. Exercise performance was tested by means of a time-trial test on a cycle ergometer, during which participants had to generate as much power as possible for duration of 10 minutes. Absolute power output significantly increased with 14.9 ± 3.9 W after 4 weeks of CF supplementation, corresponding with a 5.0% increase, compared to 3.8 ± 3.2 W (1.3% increase) in placebo (p < 0.05). In addition, oxygen consumption/power ratio significantly decreased in the CF group compared to placebo (p = 0.001), and a trend was found in the change in peak power output in CF (18.2 ± 23.2 W) versus placebo (-28.4 ± 17.6 W; p = 0.116). The current study is the first convincing report that citrus flavonoid supplementation can improve exercise performance, as shown by a significant increase in power output during the exercise test.
先前的研究表明，补充多酚可能是提高运动表现的有效策略，这归因于其抗氧化特性以及刺激一氧化氮生成的能力。这些特性可能有助于提升运动表现，但尚未有确凿研究探索柑橘类黄酮对人体运动表现的直接影响。因此，本研究的目的是评估补充定制的柑橘类黄酮（CF）提取物4周是否能提高训练有素的男性运动员的自行车计时赛成绩。在一项双盲、随机、平行研究中，39名健康、训练有素的男性每天分别服用500毫克定制的柑橘类黄酮提取物（CF）或安慰剂，持续4周。通过在自行车测力计上进行计时测试来评估运动表现测试过程中，参与者必须在10分钟内尽可能多地输出功率。补充CF 4周后，绝对功率输出显著增加了14.9±3.9瓦，增幅为5.0%，而安慰剂组增加了3.8±3.2瓦（增幅1.3%）（p<0.05）。此外，与安慰剂组相比，CF组的耗氧量/功率比显著降低（p = 0.001），并且发现CF组的峰值功率输出变化有上升趋势（18.2±23.2瓦），而安慰剂组为下降趋势（-28.4±17.6瓦；p = 0.116）。本研究是第一份有说服力的报告，表明补充柑橘类黄酮可以提高运动表现，如运动测试期间功率输出显著增加所示。
