Singhal Arpit, Trilk Jennifer L, Jenkins Nathan T, Bigelman Kevin A, Cureton Kirk J
Department of Kinesiology, Metabolism and Body Composition Laboratory, University of Georgia, Athens, Georgia 30602-6554, USA.
J Appl Physiol (1985). 2009 Mar;106(3):823-9. doi: 10.1152/japplphysiol.90726.2008. Epub 2009 Jan 15.
The purpose of this study is to determine whether moderate-intensity resistance exercise (MOD) lowers postprandial lipemia (PPL) as much as high-intensity resistance exercise (HI) of equal work. Ten healthy men performed three trials, each conducted over 2 days. On day 1 of each treatment, they either did not exercise (CON), performed 3 sets of 16 repetitions of 10 exercises at 50% of 8 repetitions maximum (MOD), or performed 3 sets of 8 repetitions of 10 exercises at 100% of 8 repetitions maximum (HI). On the morning of day 2 at 15.5 h postexercise, participants ate a high-fat meal. Venous blood samples were collected, and metabolic rate was measured at rest and 3 h postprandial. HI reduced fasting triglyceride (TG) and TG area under the curve (AUC) (36%, P = 0.011 and 35%, P = 0.014) compared with CON. MOD tended to reduce fasting TG and TG AUC (21%, P = 0.054 and 26%, P = 0.052) compared with CON, but MOD and HI did not differ in fasting TG or TG AUC. Incremental TG AUC did not differ among treatments. MOD and HI did not change resting metabolic rate. HI increased fat oxidation at rest (21%, P = 0.021) and at 3 h postprandial (39%, P = 0.009) relative to CON. MOD tended to increase fat oxidation at rest (18%, P = 0.060) relative to CON. Fat oxidation and metabolic rate did not differ in MOD and HI. MOD and HI increased the fasting quantitative insulin-sensitivity check index (4%, P = 0.001 and P = 0.004) relative to CON. As MOD and HI resulted in similar reductions in PPL and increases in fat oxidation, resistance exercise intensity does not influence PPL.
本研究的目的是确定中等强度抗阻运动（MOD）与同等工作量的高强度抗阻运动（HI）相比，降低餐后血脂异常（PPL）的效果是否相同。10名健康男性进行了三项试验，每项试验持续2天。在每种治疗的第1天，他们要么不运动（CON），要么以8次重复最大重量的50%进行10组练习，每组16次重复（MOD），要么以8次重复最大重量的100%进行10组练习，每组8次重复（HI）。在运动后15.5小时的第2天上午，参与者进食高脂肪餐。采集静脉血样，并在静息状态和餐后3小时测量代谢率。与CON相比，HI降低了空腹甘油三酯（TG）和曲线下甘油三酯面积（AUC）（分别降低36%，P = 0.011和35%，P = 0.014）。与CON相比，MOD有降低空腹TG和TG AUC的趋势（分别降低21%，P = 0.054和26%，P = 0.052），但MOD和HI在空腹TG或TG AUC方面没有差异。各治疗组之间的TG AUC增量没有差异。MOD和HI均未改变静息代谢率。与CON相比，HI增加了静息时（增加21%，P = 0.021）和餐后3小时（增加39%，P = 0.009）的脂肪氧化。与CON相比，MOD有增加静息时脂肪氧化的趋势（增加18%，P = 0.060）。MOD和HI在脂肪氧化和代谢率方面没有差异。与CON相比，MOD和HI均增加了空腹定量胰岛素敏感性检查指数（分别增加4%，P = 0.001和P = 0.004）。由于MOD和HI在降低PPL和增加脂肪氧化方面效果相似，因此抗阻运动强度不影响PPL。
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