Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Randomized Controlled Trial
, 116 (9), 1703-13

Effect of Abdominal Bracing Training on Strength and Power of Trunk and Lower Limb Muscles

Affiliations
Randomized Controlled Trial

Effect of Abdominal Bracing Training on Strength and Power of Trunk and Lower Limb Muscles

Kota Tayashiki et al. Eur J Appl Physiol.

Abstract

Purpose: It is unknown whether maximal voluntary co-contraction of abdominal muscles, called abdominal bracing, can be a training maneuver for improving strength and power of trunk and lower limb muscles. The present study aimed to elucidate this.

Methods: Twenty young adult men (23.3 ± 1.8 years) were allocated to training (TG, n = 11) or control (CG, n = 9) group. TG conducted an 8-week training program (3 days/week) consisting of 2-s maximal abdominal bracing followed by 2-s muscle relaxation (5 × 10 repetitions/day). Maximal voluntary isometric strength during trunk flexion and extension, hip extension, and knee extension, maximal lifting power from sitting position, and the thicknesses of abdominal muscles were measured before and after the intervention. In addition, surface electromyograms from trunk and lower limb muscles and intra-abdominal pressure (IAP) during the maximal abdominal bracing and maximal lifting tasks were also determined.

Results: After the intervention, TG showed significant increases in isometric trunk extension (+14.4 %) and hip extension (+34.7 %) strength and maximal lifting power (+15.6 %), while CG did not show any changes in strength and power variables. Furthermore, TG had significant gains in the muscle thickness of the oblique internal (+22.4 %), maximal IAP during abdominal bracing (+36.8 %), and the rate of IAP rise during lifting task (+58.8 %), without corresponding changes in CG.

Conclusion: The current study indicates that a training style with maximal voluntary co-contraction of abdominal muscles can be an effective maneuver for increasing strength and power during movements involving trunk and hip extensions, without using external load.

Keywords: Abdominal co-contraction; Abdominal muscle thickness; Electromyogram; Intra-abdominal pressure; Stabilization exercise.

Similar articles

See all similar articles

Cited by 7 PubMed Central articles

See all "Cited by" articles

References

    1. Med Sci Sports Exerc. 2012 Oct;44(10):1924-34 - PubMed
    1. Eur J Appl Physiol. 2014 Nov;114(11):2233-9 - PubMed
    1. Eur J Appl Physiol. 2010 May;109(2):279-86 - PubMed
    1. Appl Ergon. 2002 Sep;33(5):471-6 - PubMed
    1. J Biomech. 2008;41(3):506-14 - PubMed

Publication types

MeSH terms

LinkOut - more resources

Feedback