等距阻力训练(IRT)已成为降低动态血压(BP)的有效治疗干预措施,和血压昼夜变化。然而,一旦达到所需的血压下降,实施减少的维持剂量的疗效尚不清楚.因此,这项研究的目的是确定在年轻的正常人群中停止规定的8周IRT后8周维持期(8周)的效果.22个娱乐活动,没有抵抗训练,血压正常(24小时动态收缩压,≥130mmHg)的年轻人被随机分配到训练维持组[TG-MT;n=13(女性=5);年龄21±2岁]或非训练对照组[CON;n=9(女性=4);年龄23±3岁]。动态血压,早上的血压波动(MBPS)和平均实际变异性(ARV)进行了测量,在8周的双侧腿IRT后(在20%MVC下进行4x2分钟的收缩,休息2分钟,3天/周),并遵循8周(每周一次)的维护期。维持期结束后,在TG-MT组中,在24小时动态SBP(6±4mmHg,p<0.001),白天(5±5mmHg,p=0.002),MBPS(7±10mmHg,p=0.019)和24小时SBPARV(2.03±1.44mmHg,p=0.001),白天SBPARV(2.04±1.78mmHg,p=0.003)。这些结果表明,动态血压(24小时SBP和白天SBP)的降低,除了BP昼夜变化(MBPS,在年轻人中维持8周的维持剂量后,维持24小时SBPARV和白天SBPAVR),并进一步增加了促进IRT作为预防或减少BP的有效治疗性运动干预的证据。
Isometric resistance training (IRT) has emerged as an efficacious therapeutic intervention to reduce ambulatory blood pressure (BP), and BP diurnal variability. However, once the required decreases in BP have been achieved the efficacy of implementing a reduced
maintenance dose is not understood. Therefore, the purpose of this study was to determine the effects of an 8-week
maintenance period (8-week) following the cessation of the prescribed 8-week IRT in young normotensives. Twenty-two recreationally active, not resistance trained, normotensive (24-h ambulatory SBP, ≥130 mmHg) young adults were randomly assigned to a training-
maintenance [TG-MT; n = 13 (female = 5); age 21 ± 2 years] or a non-training control [CON; n = 9 (female = 4); age 23 ± 3 years] group. Ambulatory BP, morning BP surge (MBPS) and average real variability (ARV) were measured prior to, after 8 weeks of bilateral leg IRT (4x2-minute contractions at 20% MVC with 2-min rest periods, 3 days/week) and following an 8-week (once per week)
maintenance period. On completion of the
maintenance period the significant reductions seen following the IRT were maintained within the TG-MT group in 24-h ambulatory SBP (6 ± 4 mmHg, p < 0.001), daytime (5 ± 5 mmHg, p = 0.002), MBPS (7 ± 10 mmHg, p = 0.019) and 24-h SBP ARV (2.03 ± 1.44 mmHg, p = 0.001), daytime SBP ARV (2.04 ± 1.78 mmHg, p = 0.003). These results show that reductions in ambulatory BP (24-h SBP and daytime SBP), in addition to BP diurnal variations (MBPS, 24-h SBP ARV and daytime SBP AVR) are maintained following an 8-week maintenance dose in young adults and add further weight to the growing body of evidence promoting IRT as an efficacious therapeutic exercise intervention to prevent or reduce BP.