Understanding the impairments and management of Osgood Schlatter Disease in adolescent athletes About this research We're investigating the reliability of outcome measures and to provide comparison data for adolescents with knee pain. Who can participate You're eligible to participate in this study if you: are aged 8–18 years old have no current pain or injuries. What's involved As part of this study, participants: will attend a one-hour physical assessment at St Lucia campus, where a researcher will measure your leg strength and how you move will complete an online survey (approximately 10 minutes) may be invited to return for a second assessment approximately one week later. Benefits of participating Participants will receive a $20 gift card per session attended. Parking and appointments in this study will be provided free of charge. How to participate If you or your child meet the eligibility criteria and you’re interested in participating, register your interest. Register your interest Ethics, data collection and privacy This study has been approved by The University of Queensland Human Research Ethics Committee [Approval No.2023/HE001497]. Contact If you have any questions email Chris Zillmann c.zillmann@uq.edu.au.