Department of Physical and Sports Education, Faculty of Physical Activity and Sport Sciences, Sport Performance and Physical Fitness Research Group (UIRFIDE), University of Valencia, Valencia,Spain.
University of Alicante, Alicante,Spain.
J Sport Rehabil. 2023 Jan 14;32(4):361-368. doi: 10.1123/jsr.2022-0240. Print 2023 May 1.
Resistance training with blood flow restriction (BFR) has increased in clinical rehabilitation due to the substantial benefits observed in augmenting muscle mass and strength using low loads. However, there is a great variability of training pressures for clinical populations as well as methods to estimate it. The aim of this study was to estimate the percentage of maximal BFR that could result by applying different methodologies based on arbitrary or individual occlusion levels using a cuff width between 9 and 13 cm.
A secondary analysis was performed on the combined databases of 2 previous larger studies using BFR training.
To estimate these percentages, the occlusion values needed to reach complete BFR (100% limb occlusion pressure [LOP]) were estimated by Doppler ultrasound. Seventy-five participants (age 24.32 [4.86] y; weight: 78.51 [14.74] kg; height: 1.77 [0.09] m) were enrolled in the laboratory study for measuring LOP in the thigh, arm, or calf.
When arbitrary values of restriction are applied, a supra-occlusive LOP between 120% and 190% LOP may result. Furthermore, the application of 130% resting brachial systolic blood pressure creates a similar occlusive stimulus as 100% LOP.
Methods using 100 mm Hg and the resting brachial systolic blood pressure could represent the safest application prescriptions as they resulted in applied pressures between 60% and 80% LOP. One hundred thirty percent of the resting brachial systolic blood pressure could be used to indirectly estimate 100% LOP at cuff widths between 9 and 13 cm. Finally, methodologies that use standard values of 200 and, 300 mm Hg far exceed LOP and may carry additional risk during BFR exercise.
由于低负荷增加肌肉质量和力量的显著益处，血流限制（BFR）阻力训练在临床康复中增加。然而，临床人群的训练压力以及估计方法存在很大的差异。本研究的目的是估计使用 9 至 13 厘米袖口宽度，根据任意或个体闭塞水平应用不同方法可导致的最大 BFR 的百分比。
使用 BFR 训练的两项先前较大研究的合并数据库进行了二次分析。
为了估计这些百分比，通过多普勒超声估计达到完全 BFR（100%肢体闭塞压力[LOP]）所需的闭塞值。75 名参与者（年龄 24.32[4.86]岁；体重：78.51[14.74]kg；身高：1.77[0.09]m）在实验室研究中被招募，以测量大腿、手臂或小腿的 LOP。
当应用任意的限制值时，可能会导致超闭塞 LOP 在 120%至 190%LOP 之间。此外，应用 130%休息肱动脉收缩压会产生与 100%LOP 相似的闭塞刺激。
使用 100mmHg 和休息肱动脉收缩压的方法可能代表最安全的应用处方，因为它们产生的应用压力在 60%至 80%LOP 之间。休息肱动脉收缩压的 130%可用于在 9 至 13 厘米袖口宽度之间间接估计 100%LOP。最后，使用 200 和 300mmHg 标准值的方法远远超过 LOP，并且在 BFR 运动期间可能会带来额外的风险。
