Gonzalez Adam M, Pinzone Anthony G, Lipes Shaina E, Mangine Gerald T, Townsend Jeremy R, Allerton Timothy D, Sell Katie M, Ghigiarelli Jamie J
Department of Allied Health and Kinesiology, Hofstra University, Hempstead, NY, 11549, USA.
Department of Exercise Science and Sport Management, Kennesaw State University, Kennesaw, GA, USA.
Eur J Appl Physiol. 2022 Jul;122(7):1627-1638. doi: 10.1007/s00421-022-04940-4. Epub 2022 Apr 16.
Watermelon shows promise as an ergogenic aid due to its high concentration of L-citrulline, vitamins, minerals, and antioxidants.
The purpose of this study was to examine the effect of watermelon supplementation on exercise performance, muscle oxygenation, and vessel diameter.
In a crossover design fashion, 15 resistance-trained men (22.4 ± 2.9 years; 177.5 ± 7.1 cm; 82.7 ± 11.2 kg) were randomly assigned to supplement with either watermelon juice concentrate (WM; 2.2 g·day L-citrulline) or placebo (PL) for 7 days prior to completing an experimental trial consisting of an isometric mid-thigh pull test and acute bench press protocol. Participants completed two sets of two repetitions at 75% 1 repetition maximum (1-RM) with maximum ballistic intent followed by five repetition-maximum (RM) sets at the same load. Barbell velocity and power were measured via linear position transducer during the first two sets, while volume load and muscle oxygenation were quantified during RM sets. Brachial artery diameter and subjective perception measures were assessed at baseline and immediately pre- and post-exercise.
Except for a greater percent change in skeletal muscle oxygenation during WM compared to PL on average and across sets (mean difference = + 4.1%, p = 0.033, BF = 2.2-54.5), separate traditional and Bayesian analyses of variance with repeated measures, as well as paired-samples t tests for calculated summary measures, revealed no evidence favoring conditional differences in any measure of performance, perception, or muscle oxygenation.
Short-term watermelon supplementation does not appear to enhance isometric force production, bench press performance, blood vessel diameter, or muscle oxygenation parameters compared to PL in resistance-trained men.
西瓜因其富含L-瓜氨酸、维生素、矿物质和抗氧化剂，有望成为一种增强体能的辅助剂。
本研究旨在探讨补充西瓜对运动表现、肌肉氧合和血管直径的影响。
采用交叉设计，15名进行抗阻训练的男性（22.4±2.9岁；177.5±7.1厘米；82.7±11.2千克）在完成由等长中大腿拉伸试验和急性卧推方案组成的实验性试验前7天，被随机分配补充浓缩西瓜汁（WM；2.2克·天L-瓜氨酸）或安慰剂（PL）。参与者以最大弹道意图在75%的1次重复最大值（1-RM）下完成两组两次重复，然后在相同负荷下进行五组重复最大值（RM）训练。在前两组训练期间，通过线性位置传感器测量杠铃速度和功率，而在RM组训练期间，对体积负荷和肌肉氧合进行量化。在基线以及运动前和运动后立即评估肱动脉直径和主观感知指标。
除了与PL相比，在WM组中，平均而言且在所有组中骨骼肌氧合的变化百分比更大（平均差异=+4.1%，p=0.033，BF=2.2-54.5）外，采用重复测量的传统和贝叶斯方差分析，以及对计算出的汇总指标进行配对样本t检验，均未发现有证据表明在任何运动表现、感知或肌肉氧合指标上存在条件差异。
与安慰剂相比，短期补充西瓜似乎并不能增强抗阻训练男性的等长力量产生、卧推表现、血管直径或肌肉氧合参数。
