Willems Mark Et, Cousins Luke, Williams David, Blacker Sam D
Department of Sport and Exercise Sciences, University of Chichester, College Lane, Chichester, PO19 6PE West Sussex, UK.
Sports (Basel). 2016 Aug 5;4(3):42. doi: 10.3390/sports4030042.
New Zealand blackcurrant (NZBC) extract has been shown to enhance high-intensity intermittent treadmill running. We examined the effects of NZBC extract during the Loughborough Intermittent Shuttle Test (LIST) which involves 5 × 15 min blocks with intermittent 15-m maximal sprints, interspersed by moderate and high-intensity running to simulate team sport activity, and a subsequent run to exhaustion. Thirteen males (age: 22 ± 1 year, V ˙ O 2 max : 50 ± 5 mL·kg·min) participated in three indoor sessions (T: 24 ± 3 °C, humidity: 52% ± 9%). In the first session, a multistage fitness test was completed to determine peak running speed and estimate V ˙ O 2 max . Participants consumed NZBC extract in capsules (300 mg·day CurraNZ™) or placebo (PL) (300 mg·day microcrystalline cellulose M102) for seven days in a double-blind, randomized, cross-over design (wash-out at least seven days). NZBC extract did not affect average 15-m sprint times in each block. NZBC reduced slowing of the fastest sprint between block 1 and 5 (PL: 0.12 ± 0.07 s; NZBC: 0.06 ± 0.12 s; < 0.05). NZBC extract had no effect on heart rate, vertical jump power, lactate and time to exhaustion (PL: 13.44 ± 8.09 min, NZBC: 15.78 ± 9.40 min, > 0.05). However, eight participants had higher running times to exhaustion when consuming NZBC extract. New Zealand blackcurrant extract may enhance performance in team sports with repeated maximal sprints.
新西兰黑加仑（NZBC）提取物已被证明能增强高强度间歇跑步机跑步能力。我们在拉夫堡间歇穿梭试验（LIST）中研究了NZBC提取物的效果，该试验包括5个15分钟的时段，其间有间歇性的15米最大冲刺，穿插着中高强度跑步以模拟团队运动活动，随后进行一次跑至力竭的测试。13名男性（年龄：22±1岁，最大摄氧量：50±5毫升·千克·分钟）参加了三次室内测试（温度：24±3℃，湿度：52%±9%）。在第一次测试中，完成了一项多级体能测试以确定峰值跑步速度并估算最大摄氧量。参与者以双盲、随机、交叉设计（洗脱期至少7天）服用NZBC提取物胶囊（每天300毫克CurraNZ™）或安慰剂（PL）（每天300毫克微晶纤维素M102），持续7天。NZBC提取物对每个时段的平均15米冲刺时间没有影响。NZBC减少了第1时段和第5时段之间最快冲刺速度的减慢（PL：0.12±0.07秒；NZBC：0.06±0.12秒；P<0.05）。NZBC提取物对心率、垂直跳功率、乳酸和力竭时间没有影响（PL：13.44±8.09分钟，NZBC：15.78±9.40分钟，P>0.05）。然而，8名参与者在服用NZBC提取物时力竭跑步时间更长。新西兰黑加仑提取物可能会提高在有重复最大冲刺的团队运动中的表现。
