Faculty of Human Sciences, Waseda University, Tokorozawa, Japan.
Scand J Med Sci Sports. 2011 Aug;21(4):598-605. doi: 10.1111/j.1600-0838.2009.01077.x. Epub 2010 Mar 10.
Endurance training and ingestion of green tea extract (GTE), composed mainly of tea catechins (TC), are well known to enhance fat metabolism. However, their synergistic effects remain to be fully elucidated. We tested the hypothesis that endurance training supplemented with GTE would further accelerate whole-body fat utilization during exercise, compared with training alone, in humans. Twelve healthy male subjects [peak oxygen consumption (VO2peak), 50.7 ± 1.3 (SEM) mL/kg/min] were divided into two groups: GTE and placebo (PLA) groups. Subjects in both groups performed a cycle ergometer exercise at 60% of VO2peak for 60 min/day, 3 days/week, and daily ingested 572.8 or 0 mg TC in GTE and PLA groups for 10 weeks, respectively. Before and after training, respiratory gas exchange was measured during 90-min exercise at pre-training ∼55% of VO2peak. After training, the average respiratory exchange ratio during exercise remained unchanged in the PLA group (post-training: 0.834 ± 0.008 vs pre-training: 0.841 ± 0.004), whereas it was lower in the GTE group (post-training: 0.816 ± 0.006 vs pre-training: 0.844 ± 0.005, P<0.05). These results suggest that habitual GTE ingestion, in combination with moderate-intense exercise, was beneficial to increase the proportion of whole-body fat utilization during exercise.
耐力训练和绿茶提取物（GTE）的摄入，主要由儿茶素（TC）组成，众所周知可以增强脂肪代谢。然而，它们的协同作用仍有待充分阐明。我们测试了这样一个假设，即在人体中，与单独训练相比，耐力训练辅以 GTE 会在运动期间进一步加速全身脂肪的利用。
12 名健康男性受试者[峰值耗氧量（VO2peak），50.7±1.3（SEM）mL/kg/min]分为两组：GTE 组和安慰剂（PLA）组。两组受试者均以 60%VO2peak 的强度进行 60 分钟/天、3 天/周的自行车测力计运动，并分别在 GTE 和 PLA 组中每天摄入 572.8 或 0mg TC 持续 10 周。在训练前后，在训练前约 55%VO2peak 的 90 分钟运动期间测量呼吸气体交换。训练后，PLA 组运动期间的平均呼吸交换比保持不变（训练后：0.834±0.008 与训练前：0.841±0.004），而 GTE 组则降低（训练后：0.816±0.006 与训练前：0.844±0.005，P<0.05）。这些结果表明，习惯性 GTE 摄入与中等强度运动相结合有利于增加运动期间全身脂肪利用的比例。
