The effects of barbell load on countermovement vertical jump power and net impulse

Mundy, Peter, Lauder, Mike A., Smith, Neal A. and Lake, Jason P. (2017) The effects of barbell load on countermovement vertical jump power and net impulse. Journal of Sports Sciences, 35 (18). pp. 1781-1787. ISSN 0264-0414

[img] Text (This is an Accepted Manuscript of an article accepted by Taylor & Francis in Journal of Sports Sciences on 26 Sept 2016, available online https://www.tandfonline.com/doi/full/10.1080/02640414.2016.1236208)
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Abstract

The aim of this study was to examine the effects of barbell load on countermovement vertical
jump (CMJ) power and net impulse within a theoretically valid framework, cognisant of the
underpinning force, temporal, and spatial components. Twenty-four resistance-trained rugby
union athletes (average ± SD: age: 23.1 ± 3.4 yrs; height: 1.83 ± 0.05 m; body mass: 91.3 ±
10.5 kg) performed maximal CMJ under five experimental conditions in a randomised,
counterbalanced order: unloaded, and with additional loads of 25, 50, 75 and 100% of body
mass (BM). Peak power and average power were maximised during the unloaded condition,
both decreasing significantly (p < 0.05) as load increased. Net impulse was maximised with
75% of BM, which was significantly greater (p < 0.05) than the unloaded and 100% of BM
conditions. Net mean force and mean velocity were maximised during the unloaded condition
and decreased significantly (p < 0.05) as load increased, whereas phase duration increased
significantly (p < 0.05) as load increased. As such, the interaction between barbell load and
the underpinning force, time and displacement components should be considered by strength
and conditioning coaches when prescribing barbell loads.

Item Type: Article
Subjects: Q Science > QP Physiology
Divisions: Departments > Sport and Exercise Sciences
Related URLs:
Depositing User: Jason Lake
Date Deposited: 09 Sep 2016 10:18
Last Modified: 09 Oct 2018 13:57
URI: http://eprints.chi.ac.uk/id/eprint/1948

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