Byrd M Travis, Bergstrom Haley C
Department of Kinesiology and Health Promotion, University of Kentucky, Lexington, KY, USA.
Int J Exerc Sci. 2018 Jun 1;11(1):867-874. doi: 10.70252/OZPL9042. eCollection 2018.
This study examined the effect of an upper body dynamic constant external resistance (DCER) exercise (barbell bench press [BP]), using the very short-term training (VST) model on strength and barbell velocity. Ten (5 females, 5 males) subjects (mean ± SD age: 21.4 ± 2.8 yrs; height: 1.75 ± 0.12 m; body mass: 83 ± 8.8 kg) completed two pre-test visits (pre-test 1 and pretest 2) to serve as the within subjects control, three training visits, and one post-test visit. The subject's 1 repetition maximum (1RM) for the BP as well as the mean (BP) and peak (BP) barbell velocities were determined during pre-test 1, pre-test 2 and post-test visits. The barbell bench press throw (BT) mean (BT) and peak (BT) velocities were also measured utilizing 35% of the subject's BP 1RM as resistance. The three training visits consisted of 5 sets of 6 repetitions, at 65% of the subject's 1RM. Statistical analyses included one-way repeated measures ANOVAs and paired samples t-tests (alpha level of p≤0.05). The post-test 1RM, BT, and BT were all significantly greater than pre-test 1 (p=0.002, p=0.0001, and p=0.002) and pre-test 2 (p=0.008, p=0.034, and p=0.015), with no significant differences seen between pre-test 1 and pre-test 2 for any of the variables. The posttest BP and BP were significantly greater than pre-test 1 (p=0.024 and p=0.005), but not pre-test 2 (p=0.131 and p=0.069). These findings showed the VST model, utilizing an upper body DCER exercise improved strength and barbell velocity in untrained subjects.
本研究采用极短期训练（VST）模型，研究了上身动态恒定外力抗阻（DCER）运动（杠铃卧推[BP]）对力量和杠铃速度的影响。十名受试者（5名女性，5名男性）（平均±标准差年龄：21.4±2.8岁；身高：1.75±0.12米；体重：83±8.8千克）完成了两次预测试访视（预测试1和预测试2）作为受试者内对照，三次训练访视和一次后测试访视。在预测试1、预测试2和后测试访视期间，测定了受试者的杠铃卧推1次重复最大值（1RM）以及平均（BP）和峰值（BP）杠铃速度。还以受试者BP 1RM的35%作为阻力，测量了杠铃卧推投掷（BT）的平均（BT）和峰值（BT）速度。三次训练访视包括每组6次重复，共5组，强度为受试者1RM的65%。统计分析包括单因素重复测量方差分析和配对样本t检验（α水平p≤0.05）。后测试的1RM、BT和BT均显著高于预测试1（p = 0.002、p = 0.0001和p = 0.002）以及预测试2（p = 0.008、p = 0.034和p = 0.015），且任何变量在预测试1和预测试2之间均无显著差异。后测试的BP和BP显著高于预测试1（p = 0.024和p = 0.005），但不高于预测试2（p = 0.131和p = 0.069）。这些结果表明，采用上身DCER运动的VST模型提高了未经训练受试者的力量和杠铃速度。
