Goto Kazushige, Ishii Naokata, Kurokawa Kan, Takamatsu Kaoru
Department of Life Sciences, Graduate School of Arts and Sciences, University of Tokyo, Komaba, Tokyo, Japan.
Med Sci Sports Exerc. 2007 Jan;39(1):108-15. doi: 10.1249/01.mss.0000240321.23653.aa.
This study examined effects of prior sprint exercise on hormonal responses to subsequent resistance exercise with different recovery periods between exercise bouts.
Nine men performed three types of exercise regimens: 1) resistance exercise only (R), 2) resistance exercise with prior sprint exercise and 60 min of rest (SR60), and 3) resistance exercise with prior sprint exercise and 180 min of rest (SR180). Sprint exercises consisted of maximal sprint cycling (eight sets of 5-s sprints with 30-s rest periods between sets) with prior 10-min warm-up. Resistance exercise consisted of five exercises, each with three sets at a 10-repetition maximum with 1-min rest periods.
Prior sprint exercise significantly increased blood lactate, glycerol, epinephrine, norepinephrine, growth hormone (GH), and free testosterone concentrations (P < 0.05). Before the resistance exercise, free fatty acids concentration was higher in the SR180 trial than in the SR60 and R trials (P < 0.05), whereas GH concentration was significantly higher in the SR60 trial (P < 0.01). After the resistance exercise, no significant difference was found in responses of pH, epinephrine, norepinephrine, and free testosterone among trials. The SR180 trial showed a smaller GH response (peak value: 7.8 +/- 1.6 (SE) ng.mL(-1)) than in the R trial (12.8 +/- 3.7 ng.mL(-1)), with no significant difference between trials. In the SR60 trial, GH response to resistance exercise was attenuated (3.3 +/- 1.2 ng.mL(-1), P < 0.01). Maximal strength and power measured immediately before the resistance exercise showed no difference among trials.
These results indicate that GH response to resistance exercise was attenuated strongly when the exercise was preceded by sprint exercise and a shorter (60 min) recovery period.
本研究考查了先前的短跑运动对随后进行的抗阻运动激素反应的影响，其中两次运动之间有不同的恢复期。
九名男性进行了三种运动方案：1）仅进行抗阻运动（R）；2）先进行短跑运动，然后休息60分钟，再进行抗阻运动（SR60）；3）先进行短跑运动，然后休息180分钟，再进行抗阻运动（SR180）。短跑运动包括最大强度的自行车冲刺（八组，每组冲刺5秒，组间休息30秒），之前有10分钟的热身。抗阻运动包括五项练习，每项练习进行三组，每组以最大重复次数10次进行，组间休息1分钟。
先前的短跑运动显著提高了血乳酸、甘油、肾上腺素、去甲肾上腺素、生长激素（GH）和游离睾酮浓度（P<0.05）。在抗阻运动前，SR180试验中的游离脂肪酸浓度高于SR60和R试验（P<0.05），而SR60试验中的GH浓度显著更高（P<0.01）。抗阻运动后，各试验之间在pH值、肾上腺素、去甲肾上腺素和游离睾酮的反应方面未发现显著差异。SR180试验中GH反应（峰值：7.8±1.6（SE）ng·mL-1）比R试验（12.8±3.7 ng·mL-1）小，试验之间无显著差异。在SR60试验中，GH对抗阻运动的反应减弱（3.3±1.2 ng·mL-1，P<0.01）。在抗阻运动前立即测量的最大力量和功率在各试验之间没有差异。
这些结果表明，当抗阻运动之前进行短跑运动且恢复期较短（60分钟）时，GH对抗阻运动的反应会强烈减弱。
