Slysz Joshua T, Burr Jamie F
Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada.
Front Physiol. 2021 Jun 22;12:696488. doi: 10.3389/fphys.2021.696488. eCollection 2021.
The purpose of this study was to examine whether an individual's IPC-mediated change in cold pain sensitivity is associated with the same individual's IPC-mediated change in exercise performance. Thirteen individuals (8 males; 5 females, 27 ± 7 years, 55 ± 5 ml.kgs.min) underwent two separate cold-water immersion tests: with preceding IPC treatment and without. In addition, each participant undertook two separate 5-km cycling time trials: with preceding IPC treatment and without. Pearson correlation coefficients were used to assess the relationship between an individual's change in cold-water pain sensitivity following IPC with their change in 5-km time trial performance following IPC. During the cold-water immersion test, pain intensity increased over time ( < 0.001) but did not change with IPC ( = 0.96). However, IPC significantly reduced the total time spent under pain (-9 ± 7 s; = 0.001) during the cold-water immersion test. No relationship was found between an individual's change in time under pain ( = -0.2, = 0.6) or pain intensity ( = -0.3, = 0.3) following IPC and their change in performance following IPC. These findings suggest that IPC can modulate sensitivity to a painful stimulus, but this altered sensitivity does not explain the ergogenic efficacy of IPC on 5-km cycling performance.
本研究的目的是检验个体通过缺血预处理（IPC）介导的冷痛敏感性变化是否与该个体通过IPC介导的运动表现变化相关。13名个体（8名男性；5名女性，年龄27±7岁，摄氧量55±5 ml·kg·min）接受了两项单独的冷水浸泡试验：一次在进行IPC预处理后进行，另一次未进行预处理。此外，每位参与者还进行了两项单独的5公里自行车计时赛：一次在进行IPC预处理后进行，另一次未进行预处理。使用皮尔逊相关系数来评估个体在IPC后冷水疼痛敏感性的变化与其在IPC后5公里计时赛表现的变化之间的关系。在冷水浸泡试验中，疼痛强度随时间增加（P<0.001），但不受IPC影响（P = 0.96）。然而，IPC显著减少了冷水浸泡试验期间处于疼痛状态的总时间（-9±7秒；P = 0.001）。未发现个体在IPC后疼痛持续时间的变化（P = -0.2，P = 0.6）或疼痛强度的变化（P = -0.3，P = 0.3）与其在IPC后表现的变化之间存在关联。这些发现表明，IPC可以调节对疼痛刺激的敏感性，但这种改变的敏感性并不能解释IPC对5公里自行车运动表现的促力功效。
