I ran with my wife for about 6 or 7 years but since I've been standing on concrete factory floors for 36 years and my knees and back give me fits I gave up the running and started cycling. When I get on the bike all that pain goes away at least as long as I'm on the bike. Afterwards its a bit of a different story as the concrete catches up to me once again but on the bike the juices seem to flow and I feel great.