Terri, I'm 54 years-old and was diagnosed with PPMS about 10 years ago.  My ability to walk has steadily gotten worse since then.  I too was a pretty decent athlete until I was hit with this disease.  However, I haven't lost a day of work due my illness, and still hit the gym at least 3 days a week.  My wife and I also invested in a high quality elliptical trainer, which I use on the days I'm not a the gym.  In addition, I'm fortunate to have access to some great neurologists in the Washington, DC area.  These docs and I are not afraid to try different treatments, hoping to find that magic bullet.  So far, the only success has been in managing the symptoms but, unfortunately, not the disease.   So, here's my advice list:  1)  Stay as active as possible.   2) Join the local NMSS chapter.  I belong to the local chapter in Washington, DC.  The chapter sponsors an annual "Men with MS" day, which I always attend.   3)  Keep adjusting.   Get a  wheelchair if you need one.   Make the house more accessible.  4)  Be optimistic.  There's really no other choice.