Southeast Missouri State University, Health, Human Performance and Recreation, One University Plaza, Cape Girardeau, MO 63701, USA.
Int J Sports Med. 2011 Mar;32(3):181-4. doi: 10.1055/s-0030-1268472. Epub 2010 Dec 16.
The purpose was to determine repetitions to failure and perceptual responses to exercise with and without occlusion. 15 subjects participated in a randomized crossover study of 3 trials. The first determined one repetition maximum (1RM) on the leg extension. Subjects were then assigned to an occlusion (OCC) or control (CON) group. After trial 2, subjects crossed over to the opposite trial. Knee wraps (KW) were placed around the upper thigh of each leg during OCC. Subjects completed 2 sets of leg extensions to failure at 30% 1RM, with 30 s rest between sets. Ratings of perceived exertion (RPE) and pain (P) were taken following each set. Data were analyzed using paired sample t-tests with an alpha level of 0.01. OCC repetitions were lower for the first and second set compared to CON (p=0.001). Total work completed was significantly lower with OCC compared to CON (p=0.001). OCC RPE were higher for both the first (p=0.01) and second set (p=0.003) compared to CON. P was not different following one set but was higher with OCC over CON following the second (p=0.009). In conclusion, KW provide an OCC stimulus allowing failure to occur sooner. However, the higher perceptual responses with OCC may limit its application to the highly motivated.
目的是确定在有和没有闭塞的情况下达到力竭的重复次数和运动的知觉反应。15 名受试者参加了一项随机交叉研究的 3 项试验。第一项试验确定了腿部伸展的最大重复次数（1RM）。然后，受试者被分配到闭塞（OCC）或对照（CON）组。在第 2 次试验后，受试者交叉到相反的试验。在 OCC 期间，将膝盖包裹（KW）放在每条腿的大腿上部。受试者以 30%1RM 的强度完成 2 组腿部伸展至力竭，每组之间休息 30 秒。每次完成后，测量感觉用力（RPE）和疼痛（P）的等级。使用配对样本 t 检验分析数据，置信水平为 0.01。与 CON 相比，OCC 的第一组和第二组重复次数较低（p=0.001）。与 CON 相比，OCC 完成的总工作量明显较低（p=0.001）。OCC 的 RPE 在第一组（p=0.01）和第二组（p=0.003）都高于 CON。第一组后 P 没有差异，但第二组 OCC 高于 CON（p=0.009）。总之，KW 提供了一个 OCC 刺激，使力竭更早发生。然而，OCC 更高的知觉反应可能会限制其在高度积极的人群中的应用。
