From the Department of Kinesiology and Health Science, Stephen F. Austin State University, Nacogdoches, Texas (DPJ); Department of Health and Kinesiology, Texas A&M University, College Station, Texas (JZG, CRW, SER, SFC); Department of Kinesiology, Texas Christian University, Fort Worth, Texas (JMO); Department of Nutrition and Food Science, Texas A&M University, College Station, Texas (BLN); and Department of Health, Human Performance and Recreation, Baylor University, Waco, Texas (PWG).
Am J Phys Med Rehabil. 2018 Aug;97(8):578-584. doi: 10.1097/PHM.0000000000000923.
The purpose of the study was to compare acute bouts of aquatic treadmill (ATM) and land treadmill (LTM) exercise on flow-mediated dilation, postexercise blood pressure, plasma nitrate/nitrite, and atrial natriuretic peptide in untrained, prehypertensive men.
In a counterbalanced, crossover design, 19 untrained, prehypertensive men completed bouts of ATM and LTM on separate days. Flow-mediated dilation was measured pre-exercise and 1-hr postexercise. Blood samples were obtained pre-exercise and immediately postexercise and analyzed for plasma nitrate/nitrite and atrial natriuretic peptide. A magnitude-based inference approach to inference was used for statistical analysis.
A possible clinically beneficial increase in flow-mediated dilation (1.2%, 90% confidence interval = -0.07% to 2.5%) was observed 1 hr after ATM. In contrast, a possible clinically harmful decrease in flow-mediated dilation (-1.3%, 90% confidence interval = -2.7% to 0.2%) was observed 1 hr after LTM. The magnitude of the postexercise systolic blood pressure reduction was greater after ATM (-4.9, SD = 2.9 mm Hg) than LTM (-2.6, SD = 2.5 mm Hg). Atrial natriuretic peptide increased 34.3 (SD = 47.0%) after ATM and decreased -9.0 (SD = 40.0%) after LTM.
An acute bout of ATM induced a more favorable endothelial response and greater postexercise hypotensive response than LTM. These changes were associated with increased atrial natriuretic peptide levels after ATM.
本研究旨在比较水上跑步机（ATM）和陆地跑步机（LTM）运动对未经训练的、轻度高血压男性的血流介导的扩张、运动后血压、血浆硝酸盐/亚硝酸盐和心钠肽的影响。
在一项平衡、交叉设计中，19 名未经训练的、轻度高血压男性在不同天完成 ATM 和 LTM 的运动。运动前和运动后 1 小时测量血流介导的扩张。运动前和运动后立即采集血样，分析血浆硝酸盐/亚硝酸盐和心钠肽。采用基于幅度的推理方法进行统计分析。
运动后 1 小时，ATM 后可能出现了有益的血流介导的扩张增加（1.2%，90%置信区间=-0.07%至 2.5%）。相比之下，LTM 后可能出现了有害的血流介导的扩张减少（-1.3%，90%置信区间=-2.7%至 0.2%）。ATM 后运动后收缩压的降低幅度大于 LTM（-4.9，SD=2.9mmHg）（-2.6，SD=2.5mmHg）。心钠肽在 ATM 后增加 34.3（SD=47.0%），在 LTM 后减少-9.0（SD=40.0%）。
急性 ATM 运动引起的内皮反应更有利，运动后降压反应更大。这些变化与 ATM 后心钠肽水平的增加有关。
