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The effect of accommodating resistance on the post-activation potentiation response in Rugby League players

Scott, David J.; Ditroilo, Massimiliano; Marshall, Phil

Authors

David J. Scott

Massimiliano Ditroilo



Abstract

This study examined the post-activation potentiation (PAP) response of two conditioning activities (CA), the hexbar deadlift (HBD) and back squat (BS), combined with accommodating resistance; this adds a percentage of the total resistance during the exercise. Twenty amateur rugby league players performed two experimental trials and a control trial without a CA. Participants performed a countermovement jump (CMJ) before and 30, 90, and 180 seconds after one set of three repetitions of each CA at 70% 1 repetition maximum (RM), with up to an additional 23% 1RM from accommodating resistance. Peak power output (PPO), force at PPO, velocity at PPO and jump height were calculated for each CMJ. Surface electromyography (EMG) of the vastus lasteralis (VL), rectus femoris (BF), tibialis anterior (TA), and gastrocnemius medialis (GM) were also measured. Repeated-measures analysis of variance revealed no significant (p > 0.05) PAP response for either exercise condition when comparing CMJ variables to baseline values, nor were there any significant (p > 0.05) differences between exercise conditions. However, individualized recovery intervals (baseline vs. maximum potentiation response) demonstrated significant (p ≤ 0.05) improvements in PPO (3.99 ± 4.99%), force at PPO (4.87 ± 6.41%), velocity at PPO (4.30 ± 5.86%), jump height (8.45 ± 10.08%), VL EMG (20.37 ± 34.48%), BF EMG (22.67 ± 27.98%), TA EMG (21.96 ± 37.76%) and GM EMG (21.89 ± 19.65%). Results from this study must be interpreted with caution; however, it is conceivable that athletic performance can be acutely enhanced when complex training variables are individualized.

Journal Article Type Article
Publication Date 2018-02
Journal Journal of Strength and Conditioning Research
Print ISSN 1064-8011
Electronic ISSN 1533-4295
Publisher Lippincott, Williams & Wilkins
Peer Reviewed Peer Reviewed
Volume 32
Issue 9
Pages 2510-2520
APA6 Citation Scott, D. J., Ditroilo, M., & Marshall, P. (2018). The effect of accommodating resistance on the post-activation potentiation response in Rugby League players. Journal of strength and conditioning research, 32(9), 2510-2520. https://doi.org/10.1519/JSC.0000000000002464
DOI https://doi.org/10.1519/JSC.0000000000002464
Keywords Physical Therapy, Sports Therapy and Rehabilitation; Orthopedics and Sports Medicine; General Medicine
Publisher URL https://journals.lww.com/nsca-jscr/Abstract/publishahead/The_Effect_of_Accommodating_Resistance_on_the.95502.aspx
Copyright Statement This accepted manuscript is made available under a Creative Commons Attribution – Non-Commercial (CCBY- NC) licence.

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Copyright Statement
This accepted manuscript is made available under a Creative Commons Attribution – Non-Commercial (CCBY- NC) licence.



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