胰岛素耐量试验评价训练强度对胰岛素敏感性的影响。

L B Borghouts, K Backx, M F Mensink, H A Keizer
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引用次数: 33

摘要

本研究的目的是评估运动强度在体育锻炼对胰岛素敏感性的影响中的作用。采用胰岛素耐量试验(ITT)定量胰岛素敏感性。18名健康、年轻、未经训练的男女参加了一项为期4周、每周五次、每次1小时的自行车测力器训练计划。训练包括3分钟的自行车运动,中间穿插2分钟的低强度运动。高强度(HI)组为训练前最大输出功率(W(max))的80和40%,低强度(LI)组为40和20% W(max)。训练干预前,HI组和LI组胰岛素敏感性指数(IS(index))相似[均数(SD)分别为-0.1898(0.058)和-0.1892(0.045)]。训练后,HI组IS(指数)为-0.2358 (0.051)(P = 0.005 vs训练前),HI组IS(指数)为-0.2050 (0.035)(P = 0。099对预训练)。我们的结论是,当运动频率和持续时间保持相似时,高强度训练对胰岛素敏感性的改善更为明显。我们进一步得出结论,ITT适用于干预研究。
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Effect of training intensity on insulin sensitivity as evaluated by insulin tolerance test.

The purpose of this study was to evaluate the role of exercise intensity in the effect of physical training on insulin sensitivity. The insulin tolerance test (ITT) was applied to quantify insulin sensitivity. Eighteen healthy, young, untrained men and women participated in a 4-week, five times per week, 1-h per session bicycle-ergometer training program. Training consisted of 3-min bouts of cycling interspersed with 2 min at a lower exercise intensity. Intensities were 80 and 40% of pretraining maximal power output (W(max)) in the high-intensity (HI) and 40 and 20% W(max) in the low-intensity (LI) group. The insulin sensitivity index (IS(index)) was similar in the HI and LI group before the training intervention [mean (SD) -0.1898 (0.058) and -0.1892 (0.045), respectively]. After training, the IS(index) was -0.2358 (0.051) (P = 0.005 vs pretraining) in the HI group and -0.2050 (0.035) (P = 0. 099 against pretraining) in the LI group. We conclude that improvements in insulin sensitivity are more pronounced with high-intensity training, when exercise frequency and duration are kept similar. We further conclude that the ITT is suitable for use in intervention studies.

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