Tel Aviv University researchers have proved that exercise using Virtual Reality (VR) systems can halve the number of incidents of falls in the elderly.  Falls in adults aged 65 and over account for about 2% of all healthcare expenditures in high-income countries,

http://www.timesofisrael.com/virtual-reality-can-help-prevent-falls-in-elderly-israeli-team-finds/

http://www.thelancet.com/journals/lancet/article/PIIS0140-6736(16)31325-3/abstract