Effects of variations of the bench press exercise on the EMG activity of five shoulder muscles

Barnett, Chris, Kippers, Vaughan and Turner, Peter (1995) Effects of variations of the bench press exercise on the EMG activity of five shoulder muscles. Journal of Strength and Conditioning Research, 9 4: 222-227. doi:10.1519/00124278-199511000-00003


Author Barnett, Chris
Kippers, Vaughan
Turner, Peter
Title Effects of variations of the bench press exercise on the EMG activity of five shoulder muscles
Journal name Journal of Strength and Conditioning Research   Check publisher's open access policy
ISSN 1533-4295
1064-8011
Publication date 1995-01-01
Sub-type Article (original research)
DOI 10.1519/00124278-199511000-00003
Open Access Status Not yet assessed
Volume 9
Issue 4
Start page 222
End page 227
Total pages 6
Language eng
Subject 2732 Orthopedics and Sports Medicine
3612 Physical Therapy, Sports Therapy and Rehabilitation
Abstract This experiment investigated the effects of varying bench inclination and hand spacing on the EMG activity of five muscles acting at the shoulder joint. Six male weight trainers performed presses under four conditions of trunk inclination and two of hand spacing at 80% of their predetermined max. Preamplified surface EMG electrodes were placed over the five muscles in question. The EMG signals during the 2-sec lift indicated some significant effects of trunk inclination and hand spacing. The sternocostal head of the pectoralis major was more active during the press from a horizontal bench than from a decline bench. Also, the clavicular head of the pectoralis major was no more active during the incline bench press than during the horizontal one, but it was less active during the decline bench press. The clavicular head of the pectoralis major was more active with a narrow hand spacing. Anterior deltoid activity tended to increase as trunk inclination increased. The long head of the triceps brachii was more active during the decline and flat bench presses than the other two conditions, and was also more active with a narrow hand spacing. Latissimus dorsi exhibited low activity in all conditions.
Keyword Deltoid muscle
Electromyography
Pectoralis major
Triceps brachii
Weight training
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Fri, 05 Jan 2018, 04:47:02 EST