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