PDF(Pubmed)
Abstract：
This study aimed to investigate the effects of a single bench press (BP) vs. leg press (LP) resistance training sessions on testosterone, cortisol, C-reactive protein (CRP) interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α) concentrations, and creatine kinase (CK) activity in strength-trained males. Eleven strength-trained males participated in a cross-over randomized trial, undergoing two experimental sessions each consisting of five sets of the BP or the LP exercise to volitional failure with a load corresponding to 50% of one-repetition maximum. Blood samples were taken at baseline (BA), immediately post (POST), and 1 h after the cessation of exercise (POST-1). A significant increase in IL-6 concentration from BA to POST-1 was observed during the LP condition (p = 0.004; effect size [ES] = 0.64). Additionally, a significant main effect of time was found for increasing testosterone concentrations from BA to POST exercise (p = 0.014; ES = 0.25). A significantly lower cortisol concentration at POST-1 compared to POST (p = 0.001; ES = 1.02) was noted in the BP condition. Furthermore, a significantly lower cortisol concentration was found at POST-1 in the BP compared to the LP condition (p = 0.022; ES = 1.3). A significant increase in CK activity was reported from BA to POST (p = 0.024; ES = 0.69) and POST-1 (p = 0.045; ES = 0.55) during the LP condition, and from BA to POST-1 (p = 0.014; ES = 0.96) during the BP condition. No significant differences were found in the CRP (p = 0.659) and TNF-α concentrations (p = 0.487). These results suggest that the amount of muscle mass engaged during the resistance exercise may influence the changes in IL-6 and cortisol concentrations. Larger muscle groups, as engaged in the LP, more likely lead to elevated concentrations of IL-6 myokine.
摘要：
本研究旨在探讨单台式压力机（BP）与腿部按压（LP）睾丸激素的阻力训练课程，皮质醇,C反应蛋白（CRP）白细胞介素-6（IL-6），肿瘤坏死因子-α（TNF-α）浓度，和肌酸激酶（CK）活性在力量训练的男性。11名受过力量训练的男性参加了一项交叉随机试验，进行两次实验，每次由五组BP或LP练习组成，以达到一次重复最大负荷的50％。在基线（BA）时采集血样，立即发布(POST),和运动停止后1小时（POST-1）。在LP条件下观察到IL-6浓度从BA到POST-1的显着增加（p=0.004；效应大小[ES]=0.64）。此外,从BA到POST运动，发现时间对增加睾丸激素浓度具有显着的主要影响（p=0.014；ES=0.25）。在BP条件下，与POST相比，POST-1的皮质醇浓度显着降低（p=0.001；ES=1.02）。此外，与LP条件相比，BP中POST-1的皮质醇浓度显着降低（p=0.022；ES=1.3）。在LP条件下，从BA到POST（p=0.024；ES=0.69）和POST-1（p=0.045；ES=0.55），CK活性显着增加，在BP条件下，从BA到POST-1（p=0.014；ES=0.96）。CRP（p=0.659）和TNF-α（p=0.487）浓度差异无统计学意义。这些结果表明，在抗阻运动中参与的肌肉量可能会影响IL-6和皮质醇浓度的变化。较大的肌肉群，从事LP，更有可能导致IL-6Myokine浓度升高。
