Neo, I don'twant to venture too far off topic, but you mention that your friend had a hip replacement. The pictures of him (I am assuming the pictures are your friend) show him with a "Running Journal" hat and a running gear shirt of some sort. Is he able to run with his replaced hip? What's his age? These questions come from a person to whom running was one of life's greatest pleasures until aches and pains in the moving parts shut it down. Thanks.
he is 55 and he hikes,i dont think he is going to marathon runs any moreneo