Running is super difficult to get right because most surfaces are too hard and runners seldomly have a proper form. My dad was an elite athlete who ran for the

Running is super difficult to get right because most surfaces are too hard and runners seldomly have a proper form. My dad was an elite athlete who ran for the national team. By age 50, many of his cartilages were worn out and he experienced extreme pain while doing daily chores. He says you should only jog on grass or sand.