NCT07146243

Shoulder Injury Prevention in Adolescent Handball Players Based on Scandinavian Protocols

Shoulder Injury Prevention in Adolescent Handball Players Based on Scandinavian Protocols: A Cluster-Randomized Controlled Trial

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 137 (actual)
• Sponsor: Semmelweis University · Academic / Other
• Sex: All
• Age: 13 Years – 19 Years
• Healthy volunteers: Accepted

Summary

This cluster-randomised controlled trial will evaluate the effects of two internationally recognised shoulder injury prevention programmes - the Swedish Shoulder Control programme and the Norwegian Oslo Sports Trauma Research Center Shoulder Injury Prevention programme - on shoulder function, scapular control, and injury incidence in Hungarian adolescent handball players (U16-U20). Six elite-level teams (3 male, 3 female) from a single handball academy will be randomised by cluster into two intervention arms for an 18-week intervention period. Primary outcomes are changes in objective shoulder function tests; secondary outcomes include self-reported function and weekly injury monitoring.

Detailed description

This study is a two-armed cluster-randomised controlled trial designed to assess the effects of two established, evidence-based shoulder injury prevention programmes in Hungarian adolescent elite handball players. Both programmes have previously demonstrated effectiveness in reducing the incidence of shoulder injuries in overhead athletes; however, it remains unclear how they compare in their ability to improve specific objective outcomes such as shoulder stability, proprioception, strength, and scapular control. The trial will be conducted at a single elite handball academy, including six teams (three male, three female) in the U16-U20 age categories. Teams will be randomised at the cluster level (team) into one of two intervention arms, each performing one of the two prevention programmes for the entire competitive half-season (18 weeks). Unlike most injury prevention studies in adolescent athletes, this trial combines weekly self-reported monitoring of shoulder health (OSTRC-O Shoulder Module) with a comprehensive battery of objective, instrumented assessments of shoulder function, scapular control, strength, and proprioception. This dual approach allows for a more precise evaluation of programme effectiveness, capturing both perceived and measurable physical changes. This prevention trial forms part of a larger, ongoing research programme investigating shoulder function and return-to-sport readiness following shoulder injury in overhead athletes. The same battery of objective tests (scapular dyskinesis assessment, LSST, mLSST, CKCUEST, YBT-UQ, proprioception testing, isometric strength testing) used here is also applied in the broader project, allowing the present study to generate insights that directly inform both preventive strategies and post-injury rehabilitation protocols. The findings from this trial are expected to inform refinements of existing shoulder injury prevention protocols, enhance compliance strategies, and support sport-specific adaptations for adolescent elite handball players and other overhead athletes.

Conditions

• Injury Prevention
• Shoulder Injuries

Interventions

Type	Name	Description
BEHAVIORAL	Swedish Shoulder Control Programme	An evidence-based warm-up and strengthening routine developed for handball players to reduce the risk of shoulder injuries. The physiotherapy component includes exercises for scapular control, rotator cuff strength, and shoulder mobility. The throwing block is excluded in this trial, as it is designed for the off-season and the programme is implemented during the competitive season. Exercises are performed twice per week before training sessions, last about 15 minutes, and are supervised by two physiotherapists.
BEHAVIORAL	Norwegian OSTRC Shoulder Injury Prevention Programme	An evidence-based warm-up and strengthening routine developed for handball players to reduce the risk of shoulder injuries. The programme focuses on exercises for scapular control, rotator cuff strength, and functional shoulder stability. Exercises are performed twice per week before training sessions, last about 15 minutes, and are supervised by two physiotherapists.

Timeline

• Start date: 2025-08-01
• Primary completion: 2025-12-22
• Completion: 2025-12-22
• First posted: 2025-08-28
• Last updated: 2026-01-06

Locations

1 site across 1 country: Hungary