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Acute Effect of Intracontrast Rest Redistribution Within Complex-Contrast Training Set Strategies on Vertical Jump
Liam J Houlton1,2, Jeremy A Moody1,3, Theodoros M Bampouras4
1School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom.
Journal of Strength and Conditioning Research
|June 2, 2026
Summary
Rest redistribution in complex-contrast training (CCT) did not change vertical jump performance but increased propulsion time. However, it negatively impacted rate of force development, potentially limiting postactivation performance enhancement (PAPE).
Area of Science:
- Sports Science
- Exercise Physiology
- Biomechanics
Background:
- Complex-contrast training (CCT) enhances explosive performance via postactivation performance enhancement (PAPE).
- Standard CCT requires lengthy intracontrast rest periods (ICRP) for PAPE manifestation, posing practical limitations.
- Rest redistribution (RR) is a strategy to shorten ICRP within CCT.
Purpose of the Study:
- To assess the acute effects of redistributing intracontrast rest periods (ICRP) within complex-contrast training (CCT) set strategies.
- To investigate the impact of CCT with RR on vertical jump propulsive force and related biomechanical variables.
- To determine if RR affects postactivation performance enhancement (PAPE) during vertical jumps.
Main Methods:
- Seventeen male subjects participated in a counterbalanced, cross-sectional study.
- Participants completed 5 interventions involving different total contrast rest periods (TCRP), partitioned into ICRP and RR (30 seconds).
- Vertical jump propulsive impulse (JPROP) and force-time characteristics were measured after control (no CCT) and experimental (CCT with RR) conditions.
Main Results:
- No significant changes in overall vertical jump propulsive impulse (JPROP) were observed with CCT and RR.
- Propulsion time increased significantly in the post-conditioning jump (POST-BS) compared to the pre-conditioning jump (PRE-BS).
- Rate of force development (RFD) was significantly lower in POST-BS compared to PRE-BS, indicating a potential negative effect on explosive power production.
Conclusions:
- While rest redistribution (RR) may allow practitioners to maintain vertical jump propulsive impulse (JPROP) in time-constrained CCT protocols, it may not enhance PAPE.
- The combination of CCT and RR appears to negatively affect vertical jump propulsion strategies and limit PAPE manifestation.
- Alternative CCT set configurations should be considered to optimize rate of force development (RFD) when incorporating RR.
