My 18 year old son has taken up running. He wants to be a police officer and figures he better build up his endurance. He is not out of shape, but not too muscular and kind of tall and skinny. Anyway, I think he should have good running shoes for support, etc. but I have no idea what brand to get and I don't want to spend a fortune. He bought himself some in Walmart, but I don't know how good they really are.