I've looked at it, but haven't ditched my normal runners.
Reason is, every footfall causes a certain amount of force to be transmitted through the body. If you remove the cushioning effect of padded shoes, those forces are dissipated through the rest of the body. It can lead to knee and ankle injuries as those joints get more pounding.
I know there's always two sides to every opinion, but I daren't risk my already knackered knee and ankle.
Pete
