Initiative Description: A small-sided ball game group (SSG) or a circuit strength training group 3×40 min/week.

Study Results: Improved bone mineralization and muscular fitness of children aged 8–10 years.

Reference: Larsen, M., Nielsen, C., Wulff-Helge, E., Madsen, M., Manniche, V., Hansen, L., et al. (2018) Positive effects on bone mineralisation and muscular fitness after 10 months of intense school-based physical training for children aged 8-10 years: the FIT FIRST randomised controlled trial. British Journal of Sports Medicine. 52(4).

Level of Evidence: Very Good