Burnett Patrick J M, Willems Mark E T
Institute of Sport, Nursing and Allied Health, University of Chichester, College Lane, Chichester PO19 6PE, West Sussex, UK.
Sports (Basel). 2022 Oct 12;10(10):152. doi: 10.3390/sports10100152.
Previous studies on performance effects by New Zealand blackcurrant (NZBC) extract used mainly a single exercise task. We examined the effects of NZBC extract in a battery of rugby union-specific tests including speed, agility and strength testing. University male rugby union players ( = 13, age: 21 ± 2 years, height: 182 ± 6 cm, body mass: 87 ± 13 kg) completed two full familiarisations and two experimental visits in an indoor facility. The study had a double blind, placebo-controlled, randomised, crossover design. For the experimental visits, participants consumed NZBC extract (210 mg/day of anthocyanins for 7 days) or placebo with a 7-day wash-out. Testing order was the running-based anaerobic sprint test, the Illinois agility test, seated medicine ball (3 kg) throw, and handgrip strength. With NZBC extract, there may have been an effect for average sprint time to be faster by 1.7% (placebo: 5.947 ± 0.538 s, NZBC extract: 5.846 ± 0.571 s, d = -0.18 (trivial), = 0.06). However, with NZBC extract there may have been reduced slowing of sprint 2 (d = -0.59 (moderate), = 0.06) and reduced slowing for sprint 6 (d = -0.56 (moderate), = 0.03). In the Illinois agility test, there may have also been an effect for the mean time to be faster by 1.6% (placebo: 18.46 ± 1.44 s, NZBC extract: 18.15 ± 1.22 s, d = -0.24 (small), = 0.07). The correlation between the %change in average sprint time and %change in mean agility time was not significant (Pearson R = 0.0698, = 0.383). There were no differences for the seated medicine ball throw distance ( = 0.106) and handgrip strength ( = 0.709). Intake of NZBC extract in rugby union players seems to improve tasks that require maximal speed and agility but not muscle strength. NZBC blackcurrant extract may be able to enhance exercise performance in team sports that require repeated movements with high intensity and horizontal change of body position without affecting muscle strength.
此前关于新西兰黑醋栗（NZBC）提取物对运动表现影响的研究主要采用单一运动任务。我们在一系列橄榄球联盟特定测试中考察了NZBC提取物的效果，这些测试包括速度、敏捷性和力量测试。大学男子橄榄球联盟球员（n = 13，年龄：21±2岁，身高：182±6厘米，体重：87±13千克）在室内设施中完成了两次完整的熟悉过程和两次实验性访问。该研究采用双盲、安慰剂对照、随机、交叉设计。在实验性访问中，参与者服用NZBC提取物（每天210毫克花青素，持续7天）或安慰剂，中间有7天的洗脱期。测试顺序为基于跑步的无氧冲刺测试、伊利诺伊敏捷性测试、坐姿药球（3千克）投掷和握力测试。服用NZBC提取物后，平均冲刺时间可能快了1.7%（安慰剂：5.947±0.538秒，NZBC提取物：5.846±0.571秒，d = -0.18（微小），p = 0.06）。然而，服用NZBC提取物后，冲刺2的减速可能有所降低（d = -0.59（中等），p = 0.06），冲刺6的减速也有所降低（d = -0.56（中等），p = 0.03）。在伊利诺伊敏捷性测试中，平均时间可能也快了1.6%（安慰剂：18.46±1.44秒，NZBC提取物：18.15±1.22秒，d = -0.24（小），p = 0.07）。平均冲刺时间的百分比变化与平均敏捷时间的百分比变化之间的相关性不显著（皮尔逊相关系数R = 0.0698，p = 0.383）。坐姿药球投掷距离（p = 0.106）和握力（p = 0.709）没有差异。橄榄球联盟球员摄入NZBC提取物似乎能改善需要最大速度和敏捷性的任务，但对肌肉力量没有影响。NZBC黑醋栗提取物可能能够提高团队运动中的运动表现，这些运动需要高强度的重复动作和身体位置的水平变化，而不影响肌肉力量。
