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

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

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.

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

• Journal Article Type: Article
• Acceptance Date: Jan 16, 2018
• Publication Date: 2018-02
• Deposit Date: Mar 20, 2018
• Publicly Available Date: Mar 1, 2019
• Journal: Journal of Strength and Conditioning Research
• Print ISSN: 1064-8011
• Publisher: Lippincott, Williams & Wilkins
• Peer Reviewed: Peer Reviewed
• Volume: 32
• Issue: 9
• Pages: 2510-2520
• DOI: https://doi.org/10.1519/JSC.0000000000002464
• Keywords: Physical Therapy, Sports Therapy and Rehabilitation; Orthopedics and Sports Medicine; General Medicine
• Public URL: https://hull-repository.worktribe.com/output/748490
• Publisher URL: https://journals.lww.com/nsca-jscr/Abstract/publishahead/The_Effect_of_Accommodating_Resistance_on_the.95502.aspx
• Contract Date: Mar 22, 2018