[QUOTE= The man that uses a walk behind for 20 year is going to have a lot less back, leg, and hip problems that the sedentary man sitting on his duff for 20 years. This is proven stuff here folks...[/QUOTE]
Been walking (some of the same) lawns for 20+ years.
When winter hits I hit the treadmill.
Hey, I like beer, but I don't want to wear it! lol