Immediate Effects of High-Intensity Blood Flow Restriction Training on Muscle Performance and Muscle Soreness.

Area of Science:

• Exercise Physiology
• Sports Science
• Biomedical Engineering

Background:

• Blood flow restriction (BFR) training is a novel method to enhance muscle adaptation.
• High-intensity resistance training (HIRT) is effective for improving muscular performance.
• The combined approach of HIRT with BFR (HIRT-BFR) warrants investigation for immediate training effects.

Purpose of the Study:

• To compare the immediate effects of HIRT-BFR versus HIRT on rectus femoris (RF) muscle.
• To assess changes in muscle activity, reaction time, muscular performance, and DOMS.

Main Methods:

• Twenty-four healthy young adults were randomized into HIRT-BFR or HIRT groups.
• Both groups performed one session of HIRT at 80% of 1RM for the RF muscle.
• Superficial electromyography (sEMG), single-leg squat test, and Visual Analog Scale for DOMS were used for assessments.

Main Results:

• Both HIRT-BFR and HIRT significantly increased single-leg squat performance.
• DOMS levels significantly decreased in both groups post-training.
• No significant differences were observed between HIRT-BFR and HIRT for sEMG parameters, muscle performance, or DOMS.

Conclusions:

• HIRT-BFR and HIRT yield similar immediate effects on rectus femoris muscle activation, reaction time, and performance.
• Both training modalities effectively reduce delayed onset muscle soreness (DOMS).
• HIRT-BFR may offer comparable benefits to HIRT without significant differences in acute outcomes.