I tried this with a friend who had lost 100+ #. It was just funny. It appears impossible to add that much weight . We tried sand, sewed into an old piece of clothing. Unable to lift it. Just think of carrying all that weigt around before you lost it. I have to lose 90#. Inconcievable. Maybe I'll add just a few per week as I lose it. If I can carry 90# around I'll have a lot of muscle.