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

Peter Mundy, N.A. Smith, M.A. Lauder, J.P. Lake

Research output: Contribution to journalArticle

6 Citations (Scopus)
10 Downloads (Pure)

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. A total of 24 resistance-trained rugby union athletes (average ± SD: age: 23.1 ± 3.4 years; height: 1.83 ± 0.05 m; body mass (BM): 91.3 ± 10.5 kg) performed maximal CMJ under 5 experimental conditions in a randomised, counterbalanced order: unloaded, and with additional loads of 25%, 50%, 75%, and 100% of 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.
Original languageEnglish
Pages (from-to)1781-1787
Number of pages7
JournalJournal of Sports Sciences
Volume35
Issue number18
Early online date26 Sep 2016
DOIs
Publication statusPublished - 2017

Bibliographical note

This paper is not yet available on the repository. There is an 18 month embargo period. The paper can be made available from 26 March 2018

Keywords

  • Kinetics
  • kinematics
  • force
  • optimal load
  • performance

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