School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, Leicestershire LE11 3TU, UK.
Eur J Appl Physiol. 2013 Jan;113(1):201-9. doi: 10.1007/s00421-012-2426-5. Epub 2012 May 29.
The purpose of this investigation was to examine the use of subjective rating of perceived exertion (RPE) as a tool to self-regulate the intensity of wheelchair propulsive exercise in individuals with tetraplegia. Eight motor complete tetraplegic (C5/6 and below; ASIA Impairment Scale = A) participants completed a submaximal incremental exercise test followed by a graded exercise test to exhaustion to determine peak oxygen uptake (VO₂(peak)) on a wheelchair ergometer. On a separate day, a 20-min exercise bout was completed at an individualised imposed power output (PO) equating to 70 % of VO₂(peak). On a third occasion, participants were instructed to maintain a workload equivalent to the average RPE for the 20-min imposed condition. VO₂(peak), heart rate (HR) and PO were measured at 1-min intervals and blood lactate concentration [BLa(-)] was measured at 0, 10 and 20 min. No differences (P > 0.17) were found between mean VO₂(peak), % VO₂(peak), HR, % HR(peak), [BLa(-)], velocity or PO between the imposed and RPE-regulated trials. No significant (P > 0.05) time-by-trial interaction was present for VO₂(peak) data. A significant interaction (P < 0.001) for the PO data represented a trend for an increase in PO from 10 min to the end of exercise during the RPE-regulated condition. However, post hoc analysis revealed none of the differences in PO across time were significant (P > 0.05). In conclusion, these findings suggest that RPE can be an effective tool for self-regulating 20 min of wheelchair propulsion in a group of trained participants with tetraplegia who are experienced in wheelchair propulsion.
本研究旨在探讨主观感知用力程度（RPE）自评作为调节四肢瘫痪个体轮椅推进运动强度的工具的应用。8 名运动完全性四肢瘫痪（C5/6 及以下；美国脊髓损伤协会损伤分级=A）参与者完成了亚极量递增运动试验，随后进行了分级运动试验直至力竭，以确定在轮椅测功计上的峰值摄氧量（VO₂(peak)）。在另一天，参与者完成了 20 分钟的个体化强制功率输出（PO）为 70% VO₂(peak)的运动。在第三次，参与者被指示维持与 20 分钟强制条件的平均 RPE 等效的工作量。在 1 分钟间隔测量 VO₂(peak)、心率（HR）和 PO，在 0、10 和 20 分钟测量血乳酸浓度 [BLa(-)]。在强制和 RPE 调节试验之间，VO₂(peak)、% VO₂(peak)、HR、% HR(peak)、[BLa(-)]、速度或 PO 之间没有差异（P > 0.17）。VO₂(peak)数据的时间与试验之间不存在显著（P > 0.05）的交互作用。PO 数据的显著交互作用（P < 0.001）表示在 RPE 调节条件下，PO 从 10 分钟到运动结束时呈上升趋势。然而，事后分析显示，PO 在整个时间上的差异均不显著（P > 0.05）。总之，这些发现表明，在有经验的四肢瘫痪轮椅推进参与者中，RPE 可以作为自我调节 20 分钟轮椅推进的有效工具。
