[eru]

I've been running barefoot (real, but sometimes also in 'barefoot' shoes) on and off for years, and my feet quickly got used to it.

But then, I've always had a forefoot strike.

I also do a lot of barefoot walking.

However, the first few times I definitely ran for less than 15 minutes. That seems like overkill when getting used to barefoot running. I was sore enough in my calves for days from five minutes of running the first few times.