I like when a physical workout produces a tangible result, like biking to work, or running to the store to buy ice cream (kidding).  Sure you get a workout, but you also accomplish something you needed to do anyway.  I recently started chopping wood for this purpose.  It's a little weird because I don't have a wood stove, so it's useless to me personally.  But I know some people with stoves that would appreciate some extra chopped wood.  It's really satisfying to get a workout, then see the pile of wood my workout produced.  It doesn't even matter that it doesn't benefit me personally.  It's just good to get a workout from a method other than simply lifting things up and putting them down.