The experimental group attended a VR exercise routine twice a week for 12 weeks.

Device:1 computer virtual reality online software and 3 large projectors were used to project videos on the wall in a wrap-around state.

Participants in the control group received no intervention and had normal daily activites.

The experimental group performed a 75-90-minute VR exercise routine twice a week for 12 weeks.

The Senior Fitness Test was used to assess the functional fitness of the participants. The test has six items and evaluations of four physical functional dimensions using the following movements: Back scratch was assessed for upper body flexibility (units of measurement: cm). Chair sit-and-reach movement evaluates lower body flexibility (cm). Arm curl movement assesses upper body strength (times). Chair-stand test evaluates lower body muscle strength (times). 2-minute step exercise evaluates cardiorespiratory fitness (times). 8-foot up-and-go evaluates balance and agility, (sec).

The back scratch, chair-and-reach, arm curl, chair stand, and 2-minute step of higher scores mean better functional fitness. The 8-foot up-and-go of higher scores means poorer functional fitness.

The study measures the change in functional fitness of older adults from a 1-week baseline to 12 weeks (i.e., exercise intervention phase).

Measure older adults of height by attaching cloth ruler tape to the wall (e.g., height in centimeters).

The weight of the elderly is measured using commercially available electronic weighing machines. (e.g., weight in kilograms).

The height and weight measurements of older people are aggregated to produce a reported value (e.g., weight and height will be combined to report BMI in kg/m2).