The Effects of Strength and Balance Training on Physical Function in Overweight Children

This intervention study aims to examine the efficacy of a school-based exercise programme to improve strength and balance in overweight and obese 7-11-year-olds in the United Kingdom. The main question\[s\] it aims to answer are: * Is the school-based exercise programme effective in improving lower limb muscular strength and balance control? * How do increases in strength and balance skills impact physical function, the risk to musculoskeletal health, and physical activity? Participants will attend baseline, post-intervention, and follow-up testing that includes assessment of strength, balance, 3D gait, plantar pressure, physical function and physical activity. The intervention group will take part in physical activity sessions in their school for 1 hour twice a week for a total of 8 weeks. Researchers will compare the intervention group to a control group that will take part in no-activity sessions and carry out their normal school and seasonal activities.