I have been going to a lot of gun shows the past few years. I have a hard time walking on the floors. I think they call them masonite- like you have in shopping malls and grocery stores. They hurt my back and I heard they are harder than concrete. In the winter I can't get outside because of the cold, so I walk inside my house. I do laps. My house isn't that big. About 25 steps from one end to the other. I circle at each end. 2 laps is about 100 steps. I calculated 2500 of my steps is about a mile. I'll swing by arms. It really helps......... I don't notice the weight of carrying a gun that much when I shoot. I can go all day and lug around a pretty heavy trap gun. Or a 12 gauge O/U sporting clays gun. If I shoot a lot, it keeps me in shape. Hunting is a little bit harder. The weeds dragging on my legs. But, I try to be in shape before the season starts. That's all I got.