I need to start working out. I dropped too much weight too fast in the early going (32 pounds in my first 65 days) and lost some muscle in my chest and shoulders. I need to start toning them up while I continue to lose slowly and then try to bulk up a little after losing to below where I want to end up (160). I walk a fair amount; average is close to 4000 a day so far this year. I have dumbbells and know a few routines that would work me hard enough to build up the muscles.