They're probably going about two-to-one over the treadmills right now. Less stress on the joints. And most of them have the upper-body movement, too. You're constantly twisting the waistline, which can't hurt.  -   Ron Miller     Quotes
They're probably going about two-to-one over the treadmills right now. Less stress on the joints. And most of them have the upper-body movement, too. You're constantly twisting the waistline, which can't hurt. Ron Miller