After having had PF for over a year now, I'm wondering if running shoe design has anything to do with it. I have a few different shoes, but they all have the classic gap in the sole between heel and forefoot, and lately I've started wondering if this doesn't cause the rear portion of the foot to convexly flex as the gap 'gives way', and puts the plantar ligaments under extra duress.
I wonder what proportion of runners with continuous soles – such as the Nike structure series – also get PF?
I moved up to the Adrenaline 13 from the 12 a month ago and have had agonising foot pain and had to take a lot of time out. On checking the design, Brooks have added a large section of rigid fabric on the inside of the arch which extends further down towards the forefoot. This is causing my metatarsals to be squeezed together, and from the pain they must be rubbing together too. I'm returning them to Amazon and will try a size larger or, if that doesn't work, switch brands.
I'm biased as I run with Ealing Eagles but this is a clip of EHM from their 2012 photo reel, which shows the feel of the course really well. I think they're planning to extend the course to include another of the parks this year.