Impact of Accommodating Resistance in Potentiating Horizontal Jump Performance in Professional Rugby League Players

Strokosch, Alasdair, Louit, Loic, Seitz, Laurent, Clarke, Richard and Hughes, Jonathan D (2018) Impact of Accommodating Resistance in Potentiating Horizontal Jump Performance in Professional Rugby League Players. International Journal of Sports Physiology and Performance. pp. 1-22. ISSN 1555-0273 (In Press)

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Abstract

This study investigated the efficacy of deadlifts and box squats, with a combination of traditional and accommodating resistance, as a potentiating (PAP) stimulus of standing broad jumps (SBJ) in a multiple set contrast protocol. Twelve professional rugby league players (21.4 ± 2.5yrs; 181.3 ± 8.3cm, 91.9 ± 8.8kg; 1RM back squat/BM 1.59 ± 0.21; 1RM deadlift/BM 2.11 ± 0.25; ≥3 years resistance training experience) performed baseline SBJ before a contrast PAP protocol involving 2 repetitions of 85% 1RM box squat or deadlifts, loaded with a combination of traditional barbell weight (70% 1RM) and elastic band resistance (~15% 1RM), followed by two SBJs. Exercises were separated by 90s, and four contrast pairs were performed in total. Using a repeated measures design, all subjects performed the squat followed by the deadlift and finally the control (SBJ only) condition in the same order across consecutive weeks. Changes from baseline in SBJ distance were moderate for the box squat (Effect Size=0.64-1.03) and deadlift (ES=0.80-0.96) and trivial in the control condition (ES=0.02-0.11). The magnitude of differences in PAP effect were considered moderate (d = 0.61) for set 1, trivial for set 2 (d = 0.10) and set 3 (d = 0.05) in favor of box squats, and moderate for set 4 (d = 0.58) in favor of deadlifts. Accommodating resistance, either box squats or deadlifts are an effective means of potentiating SBJ performance across multiple sets of a contrast protocol with only 90s rest.

Item Type: Article
Article Type: Article
Uncontrolled Keywords: Orthopedics and Sports Medicine; Acceleration; Box squat; Deadlift
Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports
G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports > GV861 Ball games: Baseball, football, golf, etc.
Q Science > QP Physiology > QP301.H75 Physiology. Sport
R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Schools and Research Institutes > School of Sport and Exercise > Applied Sport & Exercise Sciences
Research Priority Areas: Sport, Exercise, Health & Wellbeing
SWORD Depositor: Ivor Dummy
Depositing User: Susan Turner
Date Deposited: 14 May 2018 14:28
Last Modified: 20 Oct 2018 00:27
URI: http://eprints.glos.ac.uk/id/eprint/5598

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