The Autoregulation Rest Redistribution Training method mitigates sex differences in neuromuscular and perceived fatigue during resistance training

Antonio Dello Iacono*, Kevin Watson, Ivan Jukic

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

Purpose: To examine the sex differences in performance and perceived fatigue during resistance training prescribed using traditional (TRA) and autoregulation rest redistribution training (ARRT) approaches.

Methods: Twelve resistance-trained males and twelve females completed two sessions including the bench press exercise matched for load (75% of 1- repetition maximum), volume (24 repetitions), and total rest (240 s). Sessions were performed in a counterbalanced randomized design with TRA consisting of 3 sets of 8 repetitions with 120 s interset rest and ARRT employing a personalized combination of clusters, repetitions per cluster, and between-cluster rest regulated with a 20% velocity loss threshold. The effects of TRA and ARRT on velocity loss, unilateral isometric peak force and rating of fatigue (ROF) were compared between sexes.

Results: The velocity loss was generally lower during ARRT compared to TRA (-0.47 ± 0.11%) with velocity loss being mitigated by ARRT to a greater extent among males compared to females (-0.37 ± 0.15%). A smaller unilateral isometric peak force decline was observed after ARRT than TRA among males compared to females (-38.4 ± 8.4N). Lower ROF after ARRT than TRA were found among males compared to females (- 1.97 ± 0.55AU). Additionally, males reported greater ROF than females across both conditions (1.92 ± 0.53AU), and ARRT resulted in lower ROF than ARRT overall (-0.83 ± 0.39 AU).

Conclusions: The ARRT approach resulted in decreased velocity loss, peak force impairment, and ROF compared to TRA in both sexes. However, male subjects exhibited more pronounced acute within-session benefits from the ARRT method.
Original languageEnglish
Number of pages11
JournalInternational Journal of Sports Physiology and Performance
DOIs
Publication statusAccepted/In press - 22 Mar 2024

Keywords

  • autonomy
  • load monitoring
  • perception
  • velocity-based training
  • velocity loss

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