Dr Monica Marta answers Qs from MSers from a neurologistís perspective. She has some good things to say about staying active and the importance of exercise to counteract fatigue. I might not agree with everything, but in general she has good advice.

http://shift.ms/magazine/2011/11/exe...m_medium=email

In this video, her #1 exercise tip is KEEP ACTIVE. Totally agree. Hmm, I wonder why.
http://shift.ms/magazine/2011/11/top...ercise-and-ms/
(She also talks about whether it is smart to exercise during a relapse. Hint: yes, in moderation)