Jun 18, 2010 — By ¾ÅÉ«ÊÓƵ News Services — If you need proof that exercise is the key to healthy aging, look no further than fitness classes led by fitness and aging expert Ruth Bohlken at ¾ÅÉ«ÊÓƵ. In spring 2010, seven students in ¾ÅÉ«ÊÓƵ's Center for Physical Activity and Aging fitness class were older than 90. Bohlken comments on the importance of maintaining an active lifestyle as we age.