Department of Kinesiology and Health Promotion, University of Kentucky, Lexington, Kentucky; and.
Ball State University, School of Kinesiology, Muncie, Indiana.
J Strength Cond Res. 2020 Dec;34(12):3346-3355. doi: 10.1519/JSC.0000000000003852.
Herrick, LP, Goh, J, Menke, W, Campbell, MS, Fleenor, BS, Abel, MG, and Bergstrom, HC. Effects of curcumin and fenugreek soluble fiber on the physical working capacity at the fatigue threshold, peak oxygen consumption, and time to exhaustion. J Strength Cond Res 34(12): 3346-3355, 2020-The purpose of this study was to examine the effects of curcumin in combination with fenugreek soluble fiber (CUR + FEN) or fenugreek soluble fiber alone (FEN) on the neuromuscular fatigue threshold (PWCFT), peak oxygen consumption (V˙o2peak), and time to exhaustion (Tlim) on a graded exercise test (GXT), in untrained subjects. The PWCFT estimates the highest power output that can be maintained without evidence of neuromuscular fatigue. Forty-seven untrained, college-aged subjects were randomly assigned to one of 3 supplementation groups; placebo (PLA, n = 15), CUR + FEN (500 mg·d, n = 18), or FEN (300 mg·d, n = 14). The subjects completed a maximal GXT on a cycle ergometer to determine the PWCFT, V˙o2peak, and Tlim before (PRE) and after (POST) 28 days of daily supplementation. Surface electromyographic signals were recorded from a bipolar electrode arrangement on the vastus lateralis of the right leg during each test. Separate one-way analysis of covariances were used to determine if there were between-group differences for adjusted POST-PWCFT, POST-V˙o2peak, and POST-Tlim values, covaried for the respective PRE-test scores. The adjusted POST-PWCFT for the CUR + FEN group (mean ± SD: 196 ± 58 W) was greater (p = 0.016) than the PLA group (168 ± 49 W) but the FEN group (185 ± 32 W) was not different from the CUR + FEN or PLA groups (p > 0.05). There were no differences for adjusted POST-V˙o2peak (p = 0.612) or POST-Tlim (p = 0.508) among the groups. These findings suggested curcumin combined with fenugreek soluble fiber might delay neuromuscular fatigue.
赫里克，LP，高，J，门克，W，坎贝尔，MS，弗利纳，BS，艾贝尔，MG 和伯格斯特龙，HC。姜黄素和葫芦巴可溶性纤维对疲劳阈值、峰值耗氧量和力竭时间的体力工作能力的影响。J 力量与调节研究 34（12）：3346-3355，2020-本研究的目的是研究姜黄素与葫芦巴可溶性纤维（CUR + FEN）或葫芦巴可溶性纤维（FEN）联合使用对未经训练的受试者分级运动测试（GXT）中的神经肌肉疲劳阈值（PWCFT）、峰值耗氧量（V˙o2peak）和力竭时间（Tlim）的影响。PWCFT 估计了可以维持而没有神经肌肉疲劳证据的最高功率输出。47 名未经训练的大学生被随机分配到 3 个补充组之一；安慰剂（PLA，n = 15）、CUR + FEN（500 mg·d，n = 18）或 FEN（300 mg·d，n = 14）。受试者在 28 天的日常补充后，在自行车测力计上进行最大 GXT，以确定 PWCFT、V˙o2peak 和 Tlim。在每次测试中，右腿股外侧肌上使用双极电极排列记录表面肌电图信号。使用协方差的单向分析来确定调整后的 POST-PWCFT、POST-V˙o2peak 和 POST-Tlim 值是否存在组间差异，这些值是各自 PRE-测试得分的协变量。CUR + FEN 组的调整后 POST-PWCFT（平均值±SD：196±58 W）高于 PLA 组（168±49 W），但 FEN 组（185±32 W）与 CUR + FEN 或 PLA 组无差异（p>0.05）。各组间调整后的 POST-V˙o2peak（p = 0.612）或 POST-Tlim（p = 0.508）无差异。这些发现表明，姜黄素与葫芦巴可溶性纤维结合可能会延迟神经肌肉疲劳。
