Department of Sport Science, Canterbury Christ Church University, Canterbury, UK.
Eur J Appl Physiol. 2010 Feb;108(3):419-28. doi: 10.1007/s00421-009-1025-6. Epub 2009 Mar 11.
No previous studies have examined the effects of isometric training intensity upon resting blood pressure (BP). The aims of this study were (a) to compare the effects of leg isometric training, performed at two intensities, upon resting systolic-SBP, diastolic-DBP and mean arterial-MAP BP; and (b) to examine selected cardiovascular variables, in an attempt to explain any changes in resting BP following training. Thirty-three participants were randomly allocated to either control, high- (HI) or low-intensity (LI) training for 8 weeks. Participants performed 4 x 2 min exercise bouts 3x weekly. Resting BP was measured at baseline, 4-weeks and post-training. SBP, DBP and MAP fell significantly in both groups after training. Changes were -5.2 +/- 4.0, -2.6 +/- 2.9 and -2.5 +/- 2.2 mmHg [HI]; -3.7 +/- 3.7, -2.5 +/- 4.8 and -2.6 +/- 2.5 mmHg [LI] for SBP, DBP and MAP, respectively. There were no significant changes in BP at 4 weeks. No significant changes were observed in any of the other cardiovascular variables examined. These findings suggest that isometric training causes reductions in SBP, DBP and MAP at a range of exercise intensities, when it is performed over 8 weeks. Furthermore, it is possible to reduce resting BP using a much lower isometric exercise intensity than has previously been shown.
先前的研究尚未考察等长训练强度对静息血压（BP）的影响。本研究的目的是：（a）比较两种强度的腿部等长训练对静息收缩压（SBP）、舒张压（DBP）和平均动脉压（MAP）的影响；（b）检查一些心血管变量，试图解释训练后静息 BP 的任何变化。33 名参与者被随机分配到对照组、高强度（HI）或低强度（LI）训练组，进行 8 周的训练。参与者每周进行 3 次，每次进行 4 次 2 分钟的运动。在基线、4 周和训练后测量静息 BP。SBP、DBP 和 MAP 在两组训练后均显著下降。变化值分别为 -5.2 +/- 4.0、-2.6 +/- 2.9 和-2.5 +/- 2.2 mmHg [HI]；-3.7 +/- 3.7、-2.5 +/- 4.8 和-2.6 +/- 2.5 mmHg [LI]。在第 4 周时，BP 没有明显变化。检查的其他心血管变量均无明显变化。这些发现表明，等长训练在 8 周的时间内，在一系列运动强度下可引起 SBP、DBP 和 MAP 的降低。此外，使用比以前显示的低得多的等长运动强度即可降低静息血压。
