ArticleBMC sports science, medicine & rehabilitation2025
Effects of overcoming isometric unilateral conditioning activity on subsequent single-leg drop jump in elite and amateur volleyball players: a randomized crossover trial.
Article in BMC sports science, medicine & rehabilitation, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06459050 (Effects of Overcoming Isometric Unilateral Conditioning Activity on Subsequent Single-Leg Drop Jump in Elite and Amateur Volleyball Players), which is not on this map. Cited by 9 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Effects of Overcoming Isometric Unilateral Conditioning Activity on Subsequent Single-Leg Drop Jump in Elite and Amateur Volleyball Players
Who cites it
9 citing papers 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
- Effects of External Load and Holding Duration on PAPE and Muscle Activation During Isometric Split Squat Conditioning Activity.Medicina (Kaunas, Lithuania) · 2026Trial
- The Effects of In-Season Complex Contrast Training on Anaerobic Performance Metrics in Elite Female Soccer Players.Journal of strength and conditioning research · 2026Article
- Priming magnitude and retention in highly trained male volleyball players are unaffected by exercise type, muscle temperature, or viscoelasticity.BMC sports science, medicine & rehabilitation · 2026Article
- Tempo-specific complex training improves lower-limb strength and neuromuscular function in male collegiate soccer players: an experimental study.BMC sports science, medicine & rehabilitation · 2026Article
- The impact of warm-up intensity on lower-limb explosive power and agility performance in male university football athletes.BMC sports science, medicine & rehabilitation · 2026Article
- Acute effects of rapid versus sustained isometric contraction durations on countermovement jump performance in national level young male soccer players.Scientific reports · 2025Article
- Isometric Conditioning Activity and Jump Performance: Impact of Training Status in Male Participants.Journal of clinical medicine · 2025Article
- How repeatable is PAPE effect: the impact of in-season isometric squat activation on countermovement jump performance enhancement in national level soccer players.BMC sports science, medicine & rehabilitation · 2025Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe study aimed to assess the acute effects of overcoming isometric split squats on subsequent single-leg drop jump (DJ) performance and the contralateral effect in volleyball players, considering training status differences.
methodsTen male elite (ELI) and ten amateur (AMA) volleyball players took part in two experimental sessions in which they performed conditioning activity (CA) consisted of 3 sets of overcoming isometric 3-second split squats, differing in the limb used: dominant (DL) or non-dominant (ND-L). Single-leg DJ was performed before and at the 4th and 8th minute post-CA for both limbs. The best post-CA attempt in terms of jump height (JH) was analyzed.
resultsResults revealed a significant increase in jump height (JH) in the non-dominant limb (ND-L) from 13.7 ± 2.6 cm to 15.5 ± 2.7 cm after CA performed by the ND-L (p = 0.001; Hedge's g = 0.65). Similarly, the reactive strength index (RSI) of the ND-L improved from 0.40 ± 0.06 to 0.45 ± 0.08 (p = 0.008; g = 0.58). Additionally, contact time in the ND-L increased significantly from 342 ± 36 ms to 375 ± 42 ms after CA performed by the dominant limb (p = 0.001; g = 0.66). In the elite (ELI) group, JH significantly increased from 16.4 ± 2.4 cm to 18.3 ± 3.3 cm (p < 0.001; g = 0.79), while RSI in the dominant limb (DL) improved from 0.47 ± 0.06 to 0.53 ± 0.07 (p = 0.011; g = 0.68).
conclusionsResults suggest that the examined CA effectively induces the post-activation performance enhancement in DJ among elite volleyball players, with a predominantly local impact on the limb executing the CA.
trial registrationNCT06459050 (Retrospectively registered).
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.