Physical activity plays a crucial role in multidomain intervention for frailty prevention.

"Declarations Conflict of interestThe authors declare no conflict of interest. Ethics approvalThe study was approved by the Ethics Review Board of Kaohsiung Veterans General Hospital and was conducted in accordance with the committee’s recommendations. Informed consentAll participants signed an informed consent form before the study began. The researcher explains the content of the consent form to the participant and also signs the consent. Participants are aware of the possible risks and benefits of participating in the study and that their privacy will be kept confidential if the results of the study are published. Participants are aware that they can withdraw from the programme at any time during the process and that this will not affect the doctor's future medical care. Participants are also aware of who they can approach for advice and questions during their participation in the study. All participants have a copy of the signed informed consent form. This study was approved by the Ethics Review Board of Kaohsiung Veterans General Hospital (VGHKS18-CT6-10). Conflict of interest The authors declare no conflict of interest."

"Funding This research received no external funding."