Muscle Oxygenation and Metabolic Regulations During Low and Moderate Intensity Exercise with Blood Flow Restriction

Abstract Objectives To examine the effects of moderate intensity resistance training with blood flow restriction on muscle strength and forearm girth. Methods Total of 39 students enrolled in this study were divided into three groups that is group A (control group), group B and group C. Group A performed exercise training without restrictive pressure, group B & C performed exercise training with 50 and 75 mmHg respectively. Both the outcome measures were evaluated on day 1 and day 12th with the help of digital dynamometer and measuring tape. Results Repeated measure ANOVA with Post hoc analysis was done using SPSS software version 20. The result of the study showed significant (p≤0.05) within subject improvement in muscle strength and muscle girth in all the three groups. However, significant improvement in muscle strength was found in between group analysis (p≤0.05). Conclusions The results of the study can be concluded as the partial blood flow restriction (50 mmHg) with moderate intensity resistance training resulted in greater handgrip strength than the other two groups. No difference was found in forearm girth among the three groups, however within the group difference was found.

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The Acute Effect of Resistance Exercise with Blood Flow Restriction with Hemodynamic Variables on Hypertensive Subjects

Journal of Human Kinetics ◽

10.2478/hukin-2014-0092 ◽

2014 ◽

Vol 43 (1) ◽

pp. 79-85 ◽

Cited By ~ 18

Author(s):

Joamira P. Araújo ◽

Eliney D. Silva ◽

Julio C. G. Silva ◽

Thiago S. P. Souza ◽

Eloíse O. Lima ◽

...

Keyword(s):

Blood Pressure ◽

Blood Flow ◽

Repeated Measures ◽

Controlled Trial ◽

Acute Effect ◽

Knee Extension ◽

Blood Flow Restriction ◽

Moderate Intensity ◽

Flow Restriction ◽

Hemodynamic Variables

Abstract The purpose of this study was to analyze systolic blood pressure (SBP), diastolic blood pressure (DBP) and the heart rate (HR) before, during and after training at moderate intensity (MI, 50%-1RM) and at low intensity with blood flow restriction (LIBFR). In a randomized controlled trial study, 14 subjects (average age 45±9,9 years) performed one of the exercise protocols during two separate visits to the laboratory. SBP, DBP and HR measurements were collected prior to the start of the set and 15, 30, 45 and 60 minutes after knee extension exercises. Repeated measures of analysis of variance (ANOVA) were used to identify significant variables (2 x 5; group x time). The results demonstrated a significant reduction in SBP in the LIBFR group. These results provide evidence that strength training performed acutely alters hemodynamic variables. However, training with blood flow restriction is more efficient in reducing blood pressure in hypertensive individuals than training with moderate intensity.

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Blood-Flow Restriction Resistance Exercise for Older Adults with Knee Osteoarthritis: A Pilot Randomized Clinical Trial

Journal of Clinical Medicine ◽

10.3390/jcm8020265 ◽

2019 ◽

Vol 8 (2) ◽

pp. 265 ◽

Cited By ~ 14

Author(s):

Sara Harper ◽

Lisa Roberts ◽

Andrew Layne ◽

Byron Jaeger ◽

Anna Gardner ◽

...

Keyword(s):

Clinical Trial ◽

Blood Flow ◽

Resistance Training ◽

Knee Osteoarthritis ◽

Randomized Clinical Trial ◽

Blood Flow Restriction ◽

Moderate Intensity ◽

Flow Restriction ◽

Symptomatic Knee Osteoarthritis ◽

Symptomatic Knee

In a pilot randomized clinical trial, participants aged ≥60 years (n = 35) with physical limitations and symptomatic knee osteoarthritis (OA) were randomized to 12 weeks of lower-body low-load resistance training with blood-flow restriction (BFR) or moderate-intensity resistance training (MIRT) to evaluate changes in muscle strength, pain, and physical function. Four exercises were performed three times per week to volitional fatigue using 20% and 60% of one repetition maximum (1RM). Study outcomes included knee extensor strength, gait speed, Short Physical Performance Battery (SPPB) performance, and pain via the Western Ontario and McMaster Universities OA Index (WOMAC). Per established guidance for pilot studies, primary analyses for the trial focused on safety, feasibility, and effect sizes/95% confidence intervals of dependent outcomes to inform a fully-powered trial. Across three speeds of movement, the pre- to post-training change in maximal isokinetic peak torque was 9.96 (5.76, 14.16) Nm while the mean difference between groups (BFR relative to MIRT) was −1.87 (−10.96, 7.23) Nm. Most other directionally favored MIRT, though more spontaneous reports of knee pain were observed (n = 14) compared to BFR (n = 3). BFR may have lower efficacy than MIRT in this context—though a fully-powered trial is needed to definitively address this hypothesis.

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