Exercise prescription using resting heart rate plus 20 or perceived exertion in cardiac rehabilitation.
Exercise prescription using resting heart rate plus 20 or perceived exertion in cardiac rehabilitation.
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DOI：
10.1097/00008483-200405000-00008
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发表时间：
2004-05-01
期刊：
影响因子：
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通讯作者：
Whaley, Mitchell H
中科院分区：
文献类型：
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作者：
Joo, Kee-Chan;Brubaker, Peter H;Whaley, Mitchell H
目的：对于开始心脏康复计划的患者，运动强度通常设定为每分钟比静息心率（RHR+20）高20次，或在博格感知运动等级量表（RPE 11-13）的11至13范围内。本研究的目的是确定实际运动强度，用这些技术表示为峰值摄氧量储备的百分比（%VO2R）。方法：在这项研究中，11名新转诊到2期心脏康复计划的患者自愿接受了症状限制运动测试和现场测试，包括以RPE 11-13和RHR+20相应水平的自定节奏地面步行10分钟。在两次测试中，气体交换数据通过Cosmed K4b获得，心率数据通过Polar监测器获得。结果：RHR+20（41.8 +/- 12.3%）和RPE 11-13 （71 +/- 15.3% mL.kg）时的平均VO2R %。Min)差异有统计学意义。RHR+20时，11例患者中有4例（36%）VO2R低于40%，6例（55%）VO2R为40% ~ 60%，1例（9%）VO2R大于60%。在RPE 11-13时，11例患者中有1例（9%）VO2R低于40%，1例（9%）VO2R为40% - 60%，9例（82%）VO2R大于60%。结论：本研究结果表明，使用RHR+20或RPE 11-13来规定2期心脏康复患者地面行走时的运动强度会导致受试者间的显著差异，并对这些方法的安全性和有效性提出了质疑。
PURPOSE: For patients starting a cardiac rehabilitation program, exercise intensity often is set 20 beats per minute above the standing resting heart rate (RHR+20) or in a range of 11 to 13 on Borg's Scale for Rating of Perceived Exertion (RPE 11-13). The purpose of this study was to determine the actual exercise intensity, expressed as a percentage of peak oxygen uptake reserve (%VO2R) using these techniques.METHODS: For this study, 11 new referrals to a phase 2 cardiac rehabilitation program voluntarily underwent a symptom-limited exercise test and a field test that consisted of self-paced over-the-ground walking for 10 minutes at levels corresponding to RPE 11-13 and RHR+20. During both tests, gas exchange data were obtained via the Cosmed K4b and heart rate via the Polar monitor.RESULTS: The mean %VO2R at RHR+20 (41.8 +/- 12.3%) and RPE 11-13 (71 +/- 15.3% mL.kg.min) were significantly different. Exercise at RHR+20 resulted in 4 of the 11 patients (36%) exercising at less than 40% VO2R, 6 of the patients (55%) exercising at 40% to 60% VO2R, and 1 of the patients (9%) exercising at more than 60% VO2R. Exercise at RPE 11-13 resulted in 1 of the 11 patients (9%) exercising at less than 40% VO2R, 1 of the patients at exercising at 40% to 60% VO2R (9%), and 9 of the patients (82%) exercising at more than 60% VO2R.CONCLUSIONS: The results of this study indicate that using RHR+20 or RPE 11-13 to prescribe exercise intensity during over-the-ground walking for phase 2 cardiac rehabilitation patients results in substantial intersubject variability and raises questions about the safety and efficacy of these approaches.