Lewis John E, Nash Mark S, Hamm Larry F, Martins Shannon C, Groah Suzanne L
Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, and The National Rehabilitation Hospital, Washington, DC, USA.
Arch Phys Med Rehabil. 2007 Sep;88(9):1205-11. doi: 10.1016/j.apmr.2007.05.016.
To examine the relationship between psychologic cues of somatic stress and physiologic responses to exercise in persons with paraplegia and tetraplegia.
Repeated measures with 2 comparison groups.
Academic medical center.
Forty-two subjects between 18 and 69 years of age with motor-complete spinal cord injury (SCI) resulting in paraplegia or tetraplegia (American Spinal Injury Association grades A and B).
Not applicable.
Subjects underwent peak graded arm ergometry during which heart rate, oxygen consumption (VO2), minute ventilation (VE), and ratings of perceived exertion (RPE) (Borg Categorical 6-20 Scale) were measured at successive work rate increments from baseline to fatigue.
There were inconsistent associations among the outcomes. For subjects with tetraplegia, RPE related positively to heart rate at the initial work rate, but there were no other significant correlations. For subjects with paraplegia, RPE did not correlate significantly with heart rate, VO2, or VE. VO2 and Ve related positively at the first and last work rates. In general, heart rate, VO2, and Ve increased as the exercise intensity increased, and were more pronounced in subjects with paraplegia. While RPE values increased with increasing work rates for each group, we found no differences between groups.
Our findings contradict the well-accepted relationships between RPE and both heart rate and VO2 during exercise by people without disabilities, and challenge the use of RPE as a valid psychophysiologic index of perceived exertion in persons with SCI.
探讨截瘫和四肢瘫患者躯体应激的心理线索与运动生理反应之间的关系。
对两个对照组进行重复测量。
学术医疗中心。
42名年龄在18至69岁之间、因运动完全性脊髓损伤（SCI）导致截瘫或四肢瘫（美国脊髓损伤协会分级为A和B级）的受试者。
不适用。
受试者进行峰值分级手臂测力计测试，在此期间，从基线到疲劳，以连续增加的工作速率测量心率、耗氧量（VO₂）、分钟通气量（VE）和主观用力感觉评分（RPE）（Borg分类6 - 20级量表）。
各结果之间的关联不一致。对于四肢瘫患者，在初始工作速率时，RPE与心率呈正相关，但没有其他显著相关性。对于截瘫患者，RPE与心率、VO₂或VE均无显著相关性。VO₂和VE在第一个和最后一个工作速率时呈正相关。一般来说，随着运动强度增加，心率、VO₂和VE升高，在截瘫患者中更为明显。虽然每组的RPE值随着工作速率增加而升高，但我们发现两组之间没有差异。
我们的研究结果与无残疾者运动期间RPE与心率和VO₂之间公认的关系相矛盾，并质疑将RPE用作SCI患者主观用力感觉的有效心理生理指标的适用性。
