Muscle activation patterns during variable resistance deadlift training with and without elastic bands

Heelas, Thomas, Theis, Nicola ORCID: 0000-0002-0775-1355 and Hughes, Jonathan (2019) Muscle activation patterns during variable resistance deadlift training with and without elastic bands. Journal of Strength and Conditioning Research. ISSN 1064-8011 (In Press)

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Abstract

The purpose of this study was to determine the effects of band-assisted variable resistance training on muscular activity in the lower limbs and barbell kinematics during the concentric phase of the deadlift. Fifteen resistance trained men (mean ± SD: 28.7 ± 9.3 y; 1.80 ± 0.90 m; 92.5 ± 15.1 kg) performed six deadlift repetitions during four loading conditions; 100 kg bar (NB), 80 kg bar with 20 kg band tension (B20), 75 kg bar with 25 kg band tension (B25) and 70 kg bar with 30 kg band tension (B30). Muscle activity from the medial gastrocnemius (MG), semitendinosus (ST), vastus medialis (VMO), vastus lateralis (VL), and gluteus maximus (GM) were recorded using surface electromyography (sEMG) during the concentric phase of the lift and expressed as a percentage of each muscle’s maximal activity, recorded during a maximal isometric contraction. Barbell power and velocity were recorded using a linear position transducer. Electromyography results showed that muscle activity significantly decreased as band resistance increased in the MG and ST (p < 0.05) and progressively decreased in the GM. No changes were observed for the VMO or VL. Peak and mean bar velocity and power significantly increased as band resistance increased. Performing the deadlift with band-assisted variable resistance increases bar power and velocity, whilst concurrently decreasing muscle activation of the posterior chain musculature. Practitioners prescribing this exercise may wish to include additional posterior chain exercises that have been shown to elicit high levels of muscle activation.

Item Type: Article
Article Type: Article
Uncontrolled Keywords: EMG; Deadlift; Power; Velocity; Accommodating resistance
Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports
Q Science > QP Physiology
Divisions: Schools and Research Institutes > School of Sport and Exercise > Applied Sport & Exercise Sciences
Research Priority Areas: Sport, Exercise, Health & Wellbeing
Depositing User: Jonathan Hughes
Date Deposited: 24 May 2019 10:23
Last Modified: 01 Oct 2019 11:30
URI: http://eprints.glos.ac.uk/id/eprint/6869

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