I watched with some amazement the 2012 50k walk yesterday, not only is this a feat of some endurance but I felt you must be mad to become involved in such a sport. My wife pointed out to me the "gait" the way they "swivelled" their hips and said...can that really be good for the body?? Now I am a runner and know that as I get older I must be sensible, I love competing in half marathons but tend to do lots of training on my Kinesis racelight tk2 for the obvious reasons that it takes the weight of my joints but allows me to train and therefore have a long running career....but the sight of all those athletics reaching the finish and being unable to stand and having to have the assistance of wheelchairs was a ridiculous spectacle....a fascinating race to watch but one you must be mad to train for knowing the lifespan of a 50k walker must be rather limited...and then those injuries