Nutrition and Exercise Metabolism Research Group, Nutrition Institute, Federal University of Rio de Janeiro, Macaé, Rio de Janeiro 27971-525, Brazil.
Postgraduate Program in Bioactive Products and Biosciences, Federal University of Rio de Janeiro, Macaé, Rio de Janeiro 27971-525, Brazil.
Int J Environ Res Public Health. 2020 Jul 18;17(14):5194. doi: 10.3390/ijerph17145194.
The current pool of data investigating the effects of a single resistance exercise session on endothelial function is divergent and inconclusive. Therefore, the purpose of the present study was to evaluate the effect of a single resistance exercise session on flow-mediated dilation (FMD) in trained individuals. Eleven healthy, young, recreationally resistance-trained individuals participated in the study. After determining the resistance exercise workload, the participants performed three sets of 10-12 repetition of leg press and leg extension exercises. By using ultrasound equipment, brachial artery FMD was assessed before (PRE) and 30 min after (POST) the resistance exercise protocol or resting (control) to evaluate endothelial function. A significant reduction in FMD response (PRE: 5.73% ± 1.21% vs. POST: 4.03% ± 1.94%, < 0.01) after resistance exercise was observed, accompanied by a large effect size ( = 1.05). No significant difference was observed in FMD in the control condition (PRE: 5.82% ± 1.19% vs. POST: 5.66% ± 1.24%, = 0.704). Additionally, no significant difference in baseline brachial artery diameter between resistance exercise (PRE: 3.30 ± 0.32 vs. POST: 3.40 ± 0.34 mm, = 0.494) and resting (PRE: 3.64 ± 0.41 vs. POST: 3.67 ± 0.62 mm, = 0.825) was observed. Our findings showed that a single resistance exercise session induced a reduction in FMD in resistance-trained individuals.
目前，关于单次抗阻运动对内皮功能影响的研究结果存在差异且尚无定论。因此，本研究旨在评估单次抗阻运动对训练有素个体的血流介导扩张（FMD）的影响。11 名健康、年轻、有规律进行抗阻训练的个体参与了本研究。在确定抗阻运动的负荷量后，参与者进行了 3 组 10-12 次的腿举和腿屈伸运动。通过使用超声设备，在抗阻运动方案或休息（对照）前后评估肱动脉 FMD，以评估内皮功能。抗阻运动后 FMD 反应显著降低（PRE：5.73%±1.21%vs.POST：4.03%±1.94%， < 0.01），伴有较大的效应量（ = 1.05）。在对照条件下，FMD 无显著差异（PRE：5.82%±1.19%vs.POST：5.66%±1.24%， = 0.704）。此外，抗阻运动（PRE：3.30±0.32 vs.POST：3.40±0.34 mm， = 0.494）和休息（PRE：3.64±0.41 vs.POST：3.67±0.62 mm， = 0.825）时，肱动脉基础直径无显著差异。我们的研究结果表明，单次抗阻运动可降低训练有素个体的 FMD。
