"CLINICAL-BFR": An exploratory blood flow restriction protocol focusing on clinical application

Area of Science:

• Exercise Physiology
• Rehabilitation Science

Background:

• Traditional blood flow restriction resistance training (BFR-Trad) offers skeletal muscle benefits but can be poorly tolerated due to high intensity and discomfort.
• Reducing BFR intensity is crucial for broader clinical application.

Purpose of the Study:

• To compare the tolerance and physiological responses of a novel Clinical BFR (BFR-Clinical) approach against traditional BFR (BFR-Trad).
• To evaluate BFR-Clinical_c (cadenced) and BFR-Clinical_a (autoregulated) protocols against BFR-Trad.

Main Methods:

• Twenty-two healthy, untrained young adults (18-30 years) participated.
• Subjects performed unilateral knee extension exercises under three randomized conditions: BFR-Trad, BFR-Clinical_c, and BFR-Clinical_a.
• Perceived exertion, discomfort, DOMS, lactate, muscle activation, and affectivity were measured.

Main Results:

• BFR-Trad induced significantly higher perceived exertion, discomfort, DOMS, and lactate levels compared to BFR-Clinical conditions.
• BFR-Clinical_a showed greater increases in muscle concentric velocity and higher affectivity ratings than BFR-Clinical_c and BFR-Trad.
• Clinical BFR protocols resulted in lower systolic blood pressure responses and reduced fatigue.

Conclusions:

• Clinical BFR is less intense, reduces pain and DOMS, and increases exercise affectivity compared to traditional BFR.
• Clinical BFR demonstrates potential for use in clinical rehabilitation settings due to improved tolerance and similar glycemic responses.
• Further research should explore the long-term efficacy and specific clinical applications of BFR-Clinical.