Influence of Intended Slow and Fast Eccentric Back Squat Velocity on Subsequent Countermovement Jump Performance
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Le résumé fourni par la source
Background: The back squat is a key strength and conditioning exercise used to develop lower-limb strength and power, yet little is known about how movement velocity influences its acute performance-enhancing effects, such as improvements in countermovement jump height and power. The present study examined the acute effects of slow (vslow) versus fast (vfast) eccentric-phase velocity during back squats performed withmaximal concentric velocity on subsequent countermovement jump (CMJ) performance, using a randomized, crossover design. Methods: Fourteen male subjects (age = 22.9 ± 1.9 years; height = 1.8 ± 0.1 m; mass = 76.4 ± 8.3 kg) visited the laboratory on two separate days and completed a comprehensive task-specific warm-up followed by three vslow or vfast back squats at 70% of one-repetition maximum. Three CMJs were performed before and 30 s, 4 min, 8 min, and 12 min after the interventions. Jump height, peak power, kinetic energy, maximum knee angle, and knee angular velocities in both eccentric (downward) and concentric (upward) phases were recorded. Results: No significant (p > 0.05) between-condition differences were detected in any measure. Compared to pre-intervention, significant increases (collapsed data) were detected in jump height (6.0%; d = 0.68–0.83), power (3.6–6%; r = 0.32–0.38), and kinetic energy (5.0–8.0%; d = 0.62–0.86) at 30 s and 4 min. Conclusions: Given the lack of between-condition differences, the eccentric movement velocity of moderate conditioning back squats with maximal concentric velocity exercises does not appear to influence subsequent jump performance enhancements. Thus, either conditioning activity can be used to improve subsequent jump performance. However, as performance was enhanced only at 30 s and 4 min post-intervention, the window of opportunity is narrow, and timing should be carefully considered when including such activities in pre-competition routines.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Influence of Intended Slow and Fast Eccentric Back Squat Velocity on Subsequent Countermovement Jump Performance
- Date Crossref
- 31/03/2026
- Éditeur
- MDPI AG
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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University of Thessaly Department of Physical Education and Sports Science pays non établi dans la noticeUniversité ou école supérieure
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University of Northampton Exercise and Life Sciences pays non établi dans la noticeUniversité ou école supérieure
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Edith Cowan University pays non établi dans la noticeUniversité ou école supérieure
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Democritus University of Thrace Department of Physical Education and Sports Science pays non établi dans la noticeUniversité ou école supérieure
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University of Derby pays non établi dans la noticeUniversité ou école supérieure
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School of Medical & Health Sciences Centre for Precision Health pays non établi dans la noticeUniversité ou école supérieure
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School of Health Sport and Exercise Science pays non établi dans la noticeUniversité ou école supérieure
Department of Physical Education and Sports Science — University of Thessaly, Exercise and Life Sciences — University of Northampton et Edith Cowan University, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.