Peter Harrison Centre for Disability Sport, School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK.
Spinal Cord. 2022 Jun;60(6):484-490. doi: 10.1038/s41393-021-00733-2. Epub 2021 Dec 8.
Cohort study.
To investigate and critique different methods for aerobic exercise intensity prescription in adults with spinal cord injury (SCI).
University laboratory in Loughborough, UK.
Trained athletes were split into those with paraplegia (PARA; n = 47), tetraplegia (TETRA; n = 20) or alternate health condition (NON-SCI; n = 67). Participants completed a submaximal step test with 3 min stages, followed by graded exercise test to exhaustion. Handcycling, arm crank ergometry or wheelchair propulsion were performed depending on the sport of the participant. Oxygen uptake (V̇O), heart rate (HR), blood lactate concentration ([BLa]) and ratings of perceived exertion (RPE) on Borg's RPE scale were measured throughout. Lactate thresholds were identified according to log-V̇O plotted against log-[BLa] (LT) and 1.5 mmol L greater than LT (LT). These were used to demarcate moderate (<LT), heavy (>LT, < LT) and severe (>LT) exercise intensity domains.
Associations between percentage of peak V̇O (%V̇O) and HR (%HR) with RPE differed between PARA and TETRA. At LT and LT, %V̇O and %HR were significantly greater in TETRA compared to PARA and NON-SCI (P < 0.05). The variation in %V̇O and %HR at lactate thresholds resulted in large variability in the domain distribution at fixed %V̇O and %HR.
Fixed %V̇O and %HR should not be used for aerobic exercise intensity prescription in adults with SCI as the method does not lead to uniform exercise intensity domain distribution.
队列研究。
调查和评价不同的有氧运动强度处方方法，适用于脊髓损伤（SCI）的成年人。
英国拉夫堡大学实验室。
将受过训练的运动员分为截瘫（PARA；n=47）、四肢瘫痪（TETRA；n=20）或其他健康状况（非 SCI；n=67）。参与者完成了一个 3 分钟阶段的次最大踏步测试，然后进行分级运动直至力竭。根据参与者的运动项目，进行手摇车、手臂曲柄测功计或轮椅推进。在整个过程中测量摄氧量（V̇O）、心率（HR）、血乳酸浓度（[BLa]）和 Borg 的 RPE 量表上的感知用力程度（RPE）。根据 V̇O 的对数与 BLa 的对数（LT）的关系以及比 LT 高 1.5 mmol·L 的值（LT）确定乳酸阈。这些用于划定中等强度（<LT）、高强度（>LT，<LT）和高强度（>LT）运动强度域。
在 PARA 和 TETRA 之间，V̇O 和 HR 的峰值百分比（%V̇O）与 RPE 的相关性不同。在 LT 和 LT 时，TETRA 的 %V̇O 和 %HR 显著高于 PARA 和非 SCI（P<0.05）。在乳酸阈处 V̇O 和 HR 的变化导致在固定的%V̇O 和%HR 下，域分布的变异性很大。
对于 SCI 成年人，不应使用固定的%V̇O 和%HR 进行有氧运动强度处方，因为该方法不会导致统一的运动强度域分布。
