Lane Michael Timothy, Byrd Mark Travis, Bell Zachary, Hurley Tyler
Exercise and Sports Science Department Eastern Kentucky University, Richmond, KY 40475, USA.
Kinesiology and Health Promotion, University of Kentucky, Lexington, KY 40509, USA.
J Funct Morphol Kinesiol. 2019 Apr 5;4(2):18. doi: 10.3390/jfmk4020018.
Currently there is a lack of research into how women respond to pre-workout supplementation. The effects of supplements on exercise performance in women, specifically to power, must be performed. This study investigated the effects of supplementation on power production and maintenance during a high-intensity cycle ergometry sprint performance, vertical jump performance, and bench press performance in women. It also investigated the effects of supplementation on power production and the maintenance of upper and lower body tasks in women. A total of 23 females (22.9 ± 3.6 years, 175.6 ± 6.5 cm, 86.9 ± 15.1 kg, 19.1 ± 8.4 body fat percentage (BF%) (mean ± std. dev.)) were familiarized with the testing protocol and maximal bench press performances were attained (49.5 ± 15.4 kg). Utilizing a double-blind crossover design, subjects completed three trials of: Five countermovement vertical jumps, a high-intensity cycle sprint protocol, which consisted of 10 maximal, five second cycle ergometer sprints. Subjects performed a velocity bench press test, utilizing 80% of their predetermined one repetition maximum (1RM) for 10 sets of three repetitions for maximal speed. For 20 min prior to each trial, the subjects ingested, in a randomized order, a pre-workout supplement (Supp), placebo+150 mg caffeine (Caff), or a placebo (PL). Peak power (PP), mean power (MP), and minimum power (MNP) were recorded for each sprint. Maximal velocity from each set was also recorded. Bike sprint and bench press data were normalized to the placebo trial for analysis. Blood lactate (bLa) was measured immediately prior to each testing session, within 2 min of the completion of the last cycle sprint and following the bench press test. Bike sprint and bench press testing showed no significant differences through the testing sessions, but did significantly decline over test battery ( < 0.05). Vertical jump performance and lactate levels were not significantly different. Supplementation with a pre-workout supplement or placebo with caffeine 20 min prior to participation showed no positive benefits to performance in female participants.
目前，对于女性如何应对运动前补充剂缺乏相关研究。必须开展补充剂对女性运动表现，特别是力量方面影响的研究。本研究调查了补充剂对女性在高强度自行车测功短跑、垂直纵跳和卧推表现期间的力量产生及维持的影响。同时还研究了补充剂对女性上下身任务的力量产生及维持的影响。共有23名女性（年龄22.9±3.6岁，身高175.6±6.5厘米，体重86.9±15.1千克，体脂率19.1±8.4%（均值±标准差））熟悉了测试方案，并达到了最大卧推成绩（49.5±15.4千克）。采用双盲交叉设计，受试者完成三项试验：五次反向纵跳、一项高强度自行车冲刺方案，该方案包括10次最大强度、每次持续5秒的自行车测功器冲刺。受试者进行了速度卧推测试，以其预先确定的一次重复最大值（1RM）的80%进行10组，每组3次重复，以达到最大速度。在每次试验前20分钟，受试者以随机顺序摄入一种运动前补充剂（Supp）、安慰剂+150毫克咖啡因（Caff）或安慰剂（PL）。记录每次冲刺的峰值功率（PP）、平均功率（MP）和最低功率（MNP）。还记录每组的最大速度。将自行车冲刺和卧推数据相对于安慰剂试验进行标准化分析。在每次测试前、最后一次自行车冲刺完成后2分钟内以及卧推测试后，测量血乳酸（bLa）。自行车冲刺和卧推测试在各测试阶段未显示出显著差异，但在整个测试组中显著下降（P<0.05）。垂直纵跳表现和乳酸水平无显著差异。在参与前20分钟补充运动前补充剂或含咖啡因的安慰剂对女性参与者的表现没有积极益处。
