_I did strive to run a Life Balance group once but didn't have enough to make it worth while given I have so many other things I do but I have always recommended a good trained physio therapist  I am all for the word  yo yo to represent fun and a physical activity a part of enjoying life and now going from the extreme of self neglect of over eating and under exercising one moment to dieting and excessive injury sustaining exercise the next. So you will never hear me say I am begining a diet. I will  howerver strive each day to care for myself and do what I believe is right for my body and mind in order to be at the best fitness I can be and as creatively fulfilled and emotionally happy as I can become.  That of course does involve having rewarding relationships with others so self care is never a selfish thing to aim for as your goal.  . 

I see one a physiotherapist myself and a certified practicing dietician whenever I seek good physical health advice. I am more into striving for lifestyle improvement than expecting drugs to cure the ailments of an aging body.  Oh I am bot dead against taking medication when it is actually needed but I do believe prescriptions are issued rather too readily because few doctors have the time to give lifestyle advice and most patients attend a doctor wanting a quick fix and not a lifetime healthy eating and exercise program advice.
When I was fitter there was one excellent sports medicine trainer at my Gym who understood seniors bodies. The osteoporosis associations usually have some good exercise links on their websites to suit seniors.

Those who study seniors fitness though are few and far between.  It will change but as the first of the baby boomers, lol, it usually changes after I pass though each stage not while I'm there yelling for it to change.