After obtaining demographic data of participants, they have been asked to respond to the Chinese version of the FS-C/FS-A, PA-SE, CUHK-PARCY, PASCQ and PedsQL. They have also been assessed for muscle strength using a hand-held dynamometer. Participants have been randomly assigned to the experimental and control groups. All participants received a telephone call inviting them to join the interventions according to their group assignment at an appointed time. Data collection has been conducted again at 3, 6, 9 and 12 months after starting the intervention. All participants has been informed that there would be home visits for data collection.