[mabbo]

I read 'Born To Run', went out and bought a pair of vibrams, then did a nice jog around a lake, maybe 4-5km. I was running barefoot style, landing more towards my toes and I felt fantastic.

The next morning I discovered that apparently, this was the first time I'd ever really used my calves before. I walked like an old man for three days, trying my best not to cry during my stretches.

Over time, I got better and took it slow, and I still swear by thin-soled shoes, but I'd advise anyone interested: take it slow at first!

[ainiriand]

I use that technique without Vibrams. I remember years ago when I learnt proper running, same feeling about the calves. So I think it has to do with the technique rather than the shoes.