Conclusions
The preliminary data indicate that a phase III trial is feasible, focusing on the mental aspect of HR‐QoL as the primary outcome. A traditional exercise program called Radio‐Taiso might be a reasonable coping strategy for older Japanese adults with frailty and pre‐frailty during the COVID‐19 pandemic, but no large‐scale clinical trial has evaluated the effectiveness of Radio‐Taiso on clinically important outcomes in this population. This phase II trial tested the adherence, safety and potential effectiveness of a home‐based Radio‐Taiso exercise program, and we examined the feasibility of a phase III trial. Our preliminary data indicated that the phase III trial will be feasible if the mental aspect of health‐related quality of life is used as the primary outcome.
