Parker N D, Hunter G R, Treuth M S, Kekes-Szabo T, Kell S H, Weinsier R, White M
University of Alabama at Birmingham Center for Aging, USA.
J Cardiopulm Rehabil. 1996 Jan-Feb;16(1):56-62. doi: 10.1097/00008483-199601000-00007.
The purpose of this study was to examine the effects of a total body strength training program on oxygen uptake (VO2), heart rate (HR), systolic blood pressure (SBP), and rate pressure product (RPP) during a submaximal walk and a weight-loaded walking test in healthy women 60-77 years old.
The submaximal walk (2 mph and 3.5% grade) took place during stage 3 of a graded exercise test. The weight-loaded walking task consisted of treadmill walking at 2 mph while carrying a box weighing 40% of maximum isometric elbow flexion strength. The women strength trained three times per week for approximately 1 hour per session for 16 weeks.
Paired t tests determined that strength increased by 57% on six isotonic strength tests (one repetition maximum) and by 29% on two isometric strength tests. A repeated measures analysis of variance (ANOVA) was used to determine the pre- to post-differences between and within the two tests (alpha = 0.05). There was no change in VO2 but HR, SBP, and RPP decreased significantly during the submaximal walk and the weight-loaded walking test. However, average HR (135 to 120 bpm) and RPP (23.3 x 10(3) to 19.3 x 10(3)) decreased more during the weight-loaded walking test than during the submaximal walk (HR: 108 to 104 bpm; RPP 18.3 x 10(3) to 17.0 x 10(3)).
In conclusion, the reduced HR, SBP, and RPP indicates that strength training may reduce cardiovascular stress during daily tasks in healthy older women.
本研究旨在探讨全身力量训练计划对60 - 77岁健康女性在次最大强度步行和负重步行测试期间的摄氧量（VO₂）、心率（HR）、收缩压（SBP）和速率压力乘积（RPP）的影响。
次最大强度步行（2英里/小时，坡度3.5%）在分级运动测试的第3阶段进行。负重步行任务包括在跑步机上以2英里/小时的速度行走，同时携带一个重量为最大等长屈肘力量40%的箱子。这些女性每周进行三次力量训练，每次训练约1小时，共训练16周。
配对t检验确定，在六项等张力量测试（一次重复最大值）中力量增加了57%，在两项等长力量测试中增加了29%。采用重复测量方差分析（ANOVA）来确定两次测试之间和内部的前后差异（α = 0.05）。在次最大强度步行和负重步行测试期间，VO₂没有变化，但HR、SBP和RPP显著降低。然而，在负重步行测试期间，平均HR（从135次/分钟降至120次/分钟）和RPP（从23.3×10³降至19.3×10³）的下降幅度比次最大强度步行期间更大（HR：从108次/分钟降至104次/分钟；RPP从18.3×10³降至17.0×10³）。
总之，HR、SBP和RPP的降低表明力量训练可能会减轻健康老年女性日常活动中的心血管压力。
