FIT FIRST for the Bones

This study aims to conduct a cluster RCT intervention study with adolescents in Denmark and investigate whether the FIT FIRST concept can improve young people's bone health. We hypothesize that students from the schools randomized to the intervention arm will show greater improvements in bone health than students randomized to the control arm. The experiment will be of societal relevance in relation to evidence for the effects of implementing high-intensity physical activity in school.

NCT Number	NCT07659587
Lead Sponsor	University of Southern Denmark
Conditions	Healthy
Enrollment	200 participants
Start Date	2026-01-12
Primary Completion	2026-12-20 (estimated)
Study Completion	2026-12-20 (estimated)
Updated on ClinicalTrials.gov	2026-06-22