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Muscle Nerve. 2015 May;51(5):713-21. doi: 10.1002/mus.24448.

Effects of exercise with and without different degrees of blood flow restriction on torque and muscle activation.

Author information

1
Department of Health, Exercise Science, and Recreation Management, The University of Mississippi, Oxford, Mississippi, USA.

Abstract

INTRODUCTION:

An unresolved question in resistance training combined with blood flow restriction (BFR) is what percentage of estimated arterial occlusion pressure provides the most robust acute muscular response.

METHODS:

Forty participants were assigned to Experiments 1, 2, or 3. Each experiment completed exercise protocols differing by pressure, exercise load, and/or volume. Torque was measured pre- and postexercise, and muscle activation was measured pre- and during each set.

RESULTS:

Pressure and load did not affect torque greatly. Muscle activation increased in all conditions (P < 0.05) and was higher with 30% 1RM compared with 20% 1RM. Pressure appeared to increase muscle activation from 40% to 50% arterial occlusion [66% vs. 87% maximal voluntary contraction (30% 1RM)] but was not further increased with higher pressure.

CONCLUSION:

Different levels of BFR may alter the acute muscular response to a degree, although higher pressures do not appear to augment these changes.

KEYWORDS:

KAATSU; amplitude; muscle hypertrophy; muscle strength; occlusion training

PMID:
25187395
DOI:
10.1002/mus.24448
[Indexed for MEDLINE]

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