Effect of Tele-exercise on Cardiorespiratory Fitness in Paediatrics

The goal of this clinical trial is to learn if telemedicine exercise programme can improve the cardiorespiratory fitness (how well your body delivers oxygen to muscles and organs) and insulin resistance in Asian children with low cardiorespiratory fitness levels. The main questions it aims to answers are: * Does telemedicine exercise programme improve the number of 20-metre laps the participant is able to run? * Does telemedicine exercise programme improve the insulin sensitivity using the Homeostatic Model Assessment for Insulin Resistance (HOMA-IR) formula? Researchers will compare the telemedicine exercise programme to current active lifestyle programme (e.g., daily step count monitoring) to see if telemedicine exercise programme is more effective in improving cardiorespiratory fitness. Participants will: * participate in weekly telemedicine exercise programme or adhere to current active lifestyle recommendations through daily step count reporting for 10 weeks * visit the clinic for pre- and post-programme cardiorespiratory fitness assessments and blood taking

Inclusion Criteria: * 12 to 17 years (secondary school students) * able to participate in school physical education lessons Exclusion Criteria: * less than 12 years or 18 years and older (non-secondary school students) * has medical or musculoskeletal condition(s) preventing participation in school physical education lessons or exercise