I fell into this trap too. I got a stress fracture on my shin from a tendon pulling on that area much more than the bone was used to. It took months to heal.
The feet are a complex tangle of muscle, bones, tendons, and nerves. They doesn't respond to increases in stress as well a muscle would. Bones and tendons can need months or even years to build up the strength to handle the stress of serious running barefoot. People who try this should ease into it slowly. Like over weeks or preferably, months.
Conveniently, I started wearing the Vibrams just for walking around in (because they're really comfortable), and did that for 6-ish months before I started running. This has resulted in a distinct lack of any health problems.
I can see how it would be really easy for someone who was actively running when they got the shoes to just go do their normal routine the first day they wore them and utterly destroy something.
If you are already a runner I could see this being the case, e.g. you put on a pair of "barefoot" shoes and then do your normal 10 miles run or whatever.
I tried to take up running last year. I bought a pair of Vivo Barefoot shoes, and thought they were great. Since I was just starting out I couldn't go more than a few hundred yards without taking breaks to walk. I eventually worked my way up to about 5 miles with a few moderate hills in the route, and never had any trouble with pain or injury.
I never grew to enjoy running however, it was always a chore and while I was doing it my mind was always racing with thoughts of other things I could be getting done if I wasn't running. I didn't feel any better, I didn't have more energy during the day, and I didn't sleep any better, so eventually I stopped.
I wear minimal shoes exclusively for walking also and it took two years for running to be really comfortable.
I am also not a serious runner at all. I think if you go into this with good fitness and expect to see your old performance soon it is very dangerous
The feet are a complex tangle of muscle, bones, tendons, and nerves. They doesn't respond to increases in stress as well a muscle would. Bones and tendons can need months or even years to build up the strength to handle the stress of serious running barefoot. People who try this should ease into it slowly. Like over weeks or preferably, months.