Electromyographical differences between the hyperextension and reverse-hyperextension

Cuthbert, M, Ripley, NJ, Suchomel, TJ, Alejo, R, McMahon, JJ ORCID: https://orcid.org/0000-0001-9952-7846 and Comfort, P ORCID: https://orcid.org/0000-0002-1131-8626 2021, 'Electromyographical differences between the hyperextension and reverse-hyperextension' , Journal of Strength and Conditioning Research, 35 (6) , pp. 1477-1483.

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Abstract

The aims of this study were to compare muscle activation of the erector spinae (ES), gluteus maximus (GMax), and biceps femoris (BF) during the hyperextension (HE) and reverse-HE (RHE) exercises. Ten subjects (age, 23 ± 4 years; height, 175.9 ± 6.9 cm; mass, 75.2 ± 9.7 kg) had electromyography (EMG) electrodes placed on the ES, GMax, and BF muscles in accordance with SENIAM (Surface EMG for Non-Invasive Assessment of Muscles) guidelines. Subjects performed 3 maximum voluntary isometric contraction trials of lumbar extension and hip extension using a handheld and isokinetic dynamometer, respectively, to normalize the EMG during the HE and RHE exercises. Three repetitions of each exercise were executed in a randomized order. High reliability (intraclass correlation coefficient ≥0.925) was observed with low variability (coefficient of variation [CV] < 10%) in all but the GMax during the extension phase of the HE (CV = 10.64%). During the extension and flexion phases, the RHE exhibited significantly greater (p ≤ 0.024; 34.1-70.7% difference) peak EMG compared with the HE in all muscles tested. Similarly, the RHE resulted in significantly greater mean EMG compared with the HE (p ≤ 0.036; 28.2-65.0% difference) in all muscles except the BF during the flexion phase (p = 9.960). Therefore, the RHE could be considered as a higher-intensity exercise for the posterior chain muscles compared with the HE, potentially eliciting greater increases in strength of the posterior chain muscles. [Abstract copyright: Copyright © 2021 National Strength and Conditioning Association.]

Item Type:	Article
Additional Information:	** From PubMed via Jisc Publications Router **Journal IDs: eissn 1533-4287 **Article IDs: pubmed: 34027916; pii: 00124278-202106000-00001 **History: published 01-06-2021
Schools:	Schools > School of Health and Society
Journal or Publication Title:	Journal of Strength and Conditioning Research
Publisher:	Lippincott, Williams & Wilkins
ISSN:	1064-8011
Related URLs:	Publication
SWORD Depositor:	Publications Router
Depositing User:	Publications Router
Date Deposited:	02 Aug 2021 11:03
Last Modified:	01 Jun 2022 02:30
URI:	https://usir.salford.ac.uk/id/eprint/60872

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