Despite a serious accident in 2000 and my heart valve replacement in 2013 I am still able to manhandle and ride all of my bikes including my 2012 Triumph Thruxton and my 1972 Fastback Commando (red of course). In addition I will ride any bike regardless of size and weight if I am given to opportunity. I appreciate that this make me truly fortunate and I really hope that it continues for many years to come.
If for health reasons you are not as fortunate as me, then just ride anything and everything that you can. Enjoy your life and your enjoy your bike(s). Remember there are many less fortunate who are not physically able to enjoy our simple pleasures.