I ride a bike 40-100 miles a week in warm weather and do a light workout in my basement rehearsal studio several times a week in the winter. I am heading down there right now. 15-30 minutes of riding my outdoor bike on a trainer, usually average 150-175 watts on the power meter, heart rate in the aerobic range 135 - 150 (I'm 61) with peaks to 175 during 1-3 sprints. Then upper body light freeweights 15-20 reps to exhaustion and crunches. Most days I also walk about 2-4 miles roundtrip in NYC from the bus station to my day job. I play congas / bongos and practice most days with 1-2 gigs a week. Recently, largely due to the economy and changes in the music scene, I have also been cutting back on heavy lifting when doing sound. The group I play with has a weekly gig playing in a NYC club with a sound system and sound guy (major luxury) and I have only been doing sound when I perform with my singer daughter in a club without a decent sound system. So far no major health problems (knock wood). The best thing about my basement workouts is that, unlike going to the gym, I get to listen to the best music in the world every day!