Got in over 7500 steps today. Started to work on upper body, but just warming up with pushups and Russian twists (with no weights) was about all I could handle. I have been doing another set of push ups and twists every now and then; I think I will need to keep doing that for a few days before I bother with the dumbbells. Actually, that is working the muscles I am worried about - chest, shoulders, arms and gut - with body weight.