ArticleScientific reports2025
Acute effects of rapid versus sustained isometric contraction durations on countermovement jump performance in national level young male soccer players.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
1 citing paper in PubMed.
- Acute Performance, Mechanical and Thermal Effects of Isometric Conditioning Versus Standardized Volleyball Pre-Training Activation in Highly Trained Male Players.Journal of sports science & medicine · 2026Trial
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2 authors.
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Abstract
This study investigated the effects of different distributions of isometric conditioning activity (ICA) within a single set-1 s contraction performed 9 repetitions (RAPID) versus 3 s contractions performed 3 repetitions (SUST)-on countermovement jump (CMJ) performance in national level young male soccer players. Fifteen players completed three conditions: RAPID, SUST each involving maximal isometric contractions in the half-back squat position, as well as a control condition without ICA. Approximately 3 min pre-ICA and at 3-, 6-, 9- and 12-min post-ICA, the CMJ performance was assessed. The results showed a significant decrease in CMJ height and relative peak power following the RAPID protocol, with the greatest impairments occurring at 12 min post-ICA. In contrast, no significant changes were observed in the reactive strength index modified, contraction time, and countermovement depth. These results demonstrate that short, repetitive isometric protocols do not facilitate subsequent jump performance, with the RAPID protocol causing a transient decrease in CMJ performance. Therefore, the RAPID protocol should not be recommended as an acute strategy for enhancing jump performance in national level young soccer players.
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