Institute of Sport, Nursing and Allied Health, College Lane, University of Chichester, Chichester PO19 6PE, UK.
Faculty of Health Sciences and Sport, University of Stirling, Stirling FK9 4LA, UK.
Nutrients. 2022 Apr 1;14(7):1475. doi: 10.3390/nu14071475.
New Zealand blackcurrant (NZBC) extract enhanced cycling-induced fat oxidation in female endurance athletes. We examined in recreationally active females the effects of NZBC extract on physiological and metabolic responses by moderate-intensity walking and the relationship of fat oxidation changes with focus on body composition parameters. Twelve females (age: 21 ± 2 y, BMI: 23.6 ± 3.1 kg·m) volunteered. Bioelectrical bioimpedance analysis was used for body composition measurements. Resting metabolic equivalent (1-MET) was 3.31 ± 0.66 mL·kg·min. Participants completed an incremental walking test with oxygen uptake measurements to individualize the treadmill walking speed at 5-MET. In a randomized, double-blind, cross-over design, the 30 min morning walks were in the same phase of each participant's menstrual cycle. No changes by NZBC extract were observed for walking-induced heart rate, minute ventilation, oxygen uptake, and carbon dioxide production. NZBC extract enhanced fat oxidation (10 responders, range: 10-66%). There was a significant correlation for changes in fat oxidation with body mass index; body fat% in legs, arms, and trunk; and a trend with fat oxidation at rest but not with body mass and habitual anthocyanin intake. The NZBC extract responsiveness of walking-induced fat oxidation is body composition-dependent and higher in young-adult females with higher body fat% in legs, arms, and trunk.
新西兰黑加仑（NZBC）提取物可增强女性耐力运动员的周期性脂肪氧化。我们在有规律运动的女性中检查了 NZBC 提取物对生理和代谢反应的影响，方法是进行中等强度的步行，并研究了脂肪氧化变化与身体成分参数的关系。12 名女性（年龄：21 ± 2 岁，BMI：23.6 ± 3.1 kg·m）自愿参加了这项研究。生物电阻抗分析法用于身体成分测量。静息代谢当量（1-MET）为 3.31 ± 0.66 mL·kg·min。参与者完成了递增步行测试，测量耗氧量，以确定跑步机步行速度为 5-MET。在一项随机、双盲、交叉设计中，每天上午的 30 分钟步行在每个参与者月经周期的同一阶段进行。NZBC 提取物对步行引起的心率、分钟通气量、耗氧量和二氧化碳产生没有影响。NZBC 提取物增强了脂肪氧化（10 名应答者，范围：10-66%）。脂肪氧化的变化与体重指数、腿部、手臂和躯干的体脂肪百分比呈显著相关，与静息时的脂肪氧化呈趋势相关，但与体重和习惯性花青素摄入量无关。步行诱导的脂肪氧化对 NZBC 提取物的反应性与身体成分有关，在腿部、手臂和躯干体脂肪百分比较高的年轻成年女性中更高。
