[Accacin]

Personally, I would say it's not even worth worrying about unless you're an elite runner.

I've been running about 10 years now, done marathons and ultra-marathons and I've have had my fair share of injuries. Not one was down to how my foot strikes the ground. Most of my problems were weak glutes and other muscles caused by sitting too much (developer lifestyle..) and incorrect footwear (in my case, too narrow).

Also, you'll find your run differently depending on how fast you run. On my fast runs, I do run on my mid/forefoot and on my easy runs, I'll be on my heel a little more.

I will say though, that once you reach a certain point focusing a little on running form will help. Things like leaning slight forward and trying to work on your cadence.