Yes, I know this thread is almost a decade old, but I thought I'd bump it.
I've been very active with a combination of cardio, mainly running and cycling, as well as strength training with dumbbells/free weights, and using an inversion table to stretch out my back a couple times a week, all of which has made gigging much easier for me, not only having the energy to get through a gig, but even hauling equipment in and out of the venue.
That being said, I was on a bunch of different antidepressants and anti-anxiety meds over the past five years due to having Aspergers/Autism and the anxiety that goes with that, and I've gained almost 80 pounds over five years because of all these frigging meds I was on. It got so bad that I couldn't keep a routine of working out regularly, and I needed to change some things.
First off, I stopped all medication back in August, and slowly got back into a regular routine of working out daily. Rightt now, and for the past month or so, I've been doing two daily sessions on my stationary bike--one in the morning, one in the evening. Started with 15-minute sessions, now at 25-minutes per session. As soon as the winter months go away, I'll be back outside running as well.