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Eur J Appl Physiol. 2016 Oct;116(10):1955-63. doi: 10.1007/s00421-016-3447-2. Epub 2016 Aug 1.

Post-exercise blood flow restriction attenuates muscle hypertrophy.

Author information

1
Department of Health, Exercise Science, and Recreation Management, Kevser Ermin Applied Physiology Laboratory, The University of Mississippi, P.O. Box 1848, University, MS, 38677, USA.
2
National Institute of Fitness and Sports in Kanoya, Kanoya, Kagoshima, Japan.
3
Department of Health, Exercise Science, and Recreation Management, Kevser Ermin Applied Physiology Laboratory, The University of Mississippi, P.O. Box 1848, University, MS, 38677, USA. jploenne@olemiss.edu.

Abstract

PURPOSE:

Applying blood flow restriction during low-load resistance training has been shown to augment muscle hypertrophy which has been attributed to metabolic accumulation. It remains unknown, however, whether metabolites can augment muscle growth when maintained post-exercise.

METHODS:

Thirteen untrained individuals (6 males and 7 females) performed 24 training sessions. The control arm performed one set of elbow flexion (70 % 1RM) to volitional fatigue, while the experimental arm performed the same protocol immediately followed by 3 min of blood flow restriction (70 % arterial occlusion). Muscle growth (ultrasound) was measured at 50, 60, and 70 % of the distance between the lateral epicondyle and acromion process.

RESULTS:

Both conditions completed the same exercise volume [3678 (95 % CI 2962, 4393) vs. 3638 kg (95 % CI 2854, 4423)]. There was a condition by time interaction (p = 0.031) demonstrating an attenuation of muscle growth at the 60 % site in the experimental [pre 3.1 (95 % CI 2.8, 3.5), post 3.1 (95 % CI 2.7, 3.5) cm] vs. control [pre 3.1 (95 % CI 2.6, 3.6), post 3.3 (95 % CI 2.8, 3.7) cm] condition. Muscle growth at the 50 % and 70 % sites was similar at the group level, although there were attenuations at the individual level. Exploratory analyses of pre-post mean (95 % CI) changes in muscle thickness suggested that this attenuation in the experimental condition occurred only in females [50 % site 0.0 (-0.2, 0.0) cm; 60 % site -0.1 (-0.3, 0.0) cm; 70 % site 0.0 (-0.1, 0.1) cm].

CONCLUSIONS:

The application of blood flow restriction post high-load training did not augment muscle growth for either sex, and appeared to attenuate muscle growth among females.

KEYWORDS:

Elbow flexion; KAATSU; Occlusion training; Oxidative stress; Resistance exercise; Strength

PMID:
27480315
DOI:
10.1007/s00421-016-3447-2
[Indexed for MEDLINE]

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