Key result
Blood flow restriction without exercise significantly increased perceived pressure, aching, and pain at progressively higher percentages of limb occlusion pressure (all P < 0.015).
Why the study?
While perceptual responses to blood flow restriction with exercise have been addressed, perceptual responses during blood flow restriction without exercise were unknown.
Do progressively increasing percentages of limb occlusion pressure during blood flow restriction without exercise intensify perceived sensations in healthy participants?
Do progressively increasing percentages of limb occlusion pressure during blood flow restriction without exercise intensify perceived sensations in healthy participants?
Higher levels of limb occlusion pressure during blood flow restriction without exercise increase perceived discomfort, suggesting that individualized lower pressures may minimize adverse perceptual responses in acute care settings.
Introduction: Blood flow restriction (BFR) without exercise is a promising approach to mitigate disuse atrophy in individuals who are hospitalized, recovering from surgery, or immobilized. While previous research has addressed the perceptual responses for BFR with exercise, these responses during BFR without exercise are unknown. This study evaluated perceptual responses at progressively increasing percentages of limb occlusion pressures (LOP), hypothesizing that each perceived sensation would intensify at higher percentages of LOP. Review of Literature: There has been no published work regarding perceptual responses during BFR without exercise. Subjects: Eighteen healthy participants (14 males and 4 females) were recruited through convenience sampling. Methods: An 11.5 cm pneumatic cuff was applied to the proximal left thigh. Sensations were assessed at 40-50% of LOP, 65-80% of LOP, and 100% of LOP using modified Borg RPE and visual analog scales. Data analysis included Friedman’s ANOVA and Wilcoxon Signed-Rank Tests with a Bonferroni-adjusted alpha of 0.017. Results: Significant differences were found for pressure, aching, and pain between 40-50% of LOP, 65-80% of LOP, and 100% of LOP [pressure: 2.1 (1.4) vs. 4.8 (2.0) vs. 7.0 (2.0); aching: 0.33 (0.48) vs. 1.3 (1.5) vs. 2.3 (2.5); pain: 0.39 (0.85) vs. 1.0 (1.7) vs. 1.9 (2.6), all P < .015]. Pins/needles and burning differed significantly between 40-50% of LOP vs. 100% of LOP and 65-80% of LOP vs. 100% of LOP [pins/needles: 0.31 (0.73) vs. 1.4 (2.1); 0.77 (1.3) vs. 1.4 (2.1), all P < .013; burning: 0.21 (0.37) vs. 1.6 (2.6); 0.92 (1.6) vs. 1.6 (2.6), all P < .013]. There were no significant differences between 40-50% of LOP and 65-80% of LOP for pins/needles or burning ( P > .017). Discussion and Conclusion: Aching, pressure, and pain increased at each percentage of LOP. Burning and pins-and-needles were not significant until 100% of LOP, suggesting ischemia-induced paresthesia. This study supports the delivery of individualized LOP to minimize potential discomfort or adverse effects on patient populations typically encountered in acute care environments.
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VanWye et al. (2025) studied Healthy (n=18). Blood flow restriction (BFR) without exercise vs. Within-subject comparison across different LOP percentages was evaluated on Perceptual responses (pressure, aching, and pain) at varying percentages of limb occlusion pressure (p=< .015). Blood flow restriction without exercise significantly increased perceived pressure, aching, and pain at progressively higher percentages of limb occlusion pressure (all P < 0.015).
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