ArticleJournal of athletic training2025
Decreased Hip Flexion during Spike Jump-Landings after Fatigue is Predictive of Patellar Tendinopathy in Volleyball.
Article in Journal of athletic training, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
contextPatellar tendinopathy (PT) is a highly prevalent overuse injury in volleyball. However, little is known if and how the risk for developing PT is increased through fatigue-induced alterations during repetitive jump-landing activities in volleyball.
objectiveThe purpose of this study was to explore fatigue-induced risk factors for PT during a spike jump-landing task in volleyball.
designProspective cohort study.
setting3D biomechanical laboratory screening. PATIENTS OR OTHER
participantsSeventy-nine adult, male volleyball players. MAIN OUTCOME MEASURE(S): At baseline (pre-season), 3D full-body kinematics and kinetics were collected while performing a spike jump before and after a volleyball-specific fatigue protocol. Throughout the season, players were followed for the occurrence of PT and survival analysis with competing risks was performed to identify significant predictors for the development of PT (p < 0.05).
resultsDuring follow-up, 10 of the 79 players developed PT (13%). Players with significantly less hip flexion during the horizontal landing/push-off phase of the spike jump after fatigue were at higher risk for developing PT (HR = 0.898; 95% CI 0.826 to 0.977; p = 0.023) as well as players with a significantly more elongated rectus femoris muscle-tendon unit (HR = 3.258; 95% CI 1.136 to 9.343; p = 0.032).
conclusionsDespite the low (injured) sample size of this study, preliminary research findings indicate less hip flexion and more elongated rectus femoris muscle-tendon units during landing after fatigue as potential risk factors for developing PT. Future prevention programs for PT may wish to focus on hip-specific exercises and technique modifications (e.g., more hip flexion during landing) under fatigued circumstances.
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.