Hi, Gents.
This is a great thread. Thought I'd add my 2 cent's worth here.
I've been running for nearly 27 years now. Have performed on Jr. Triath's and Marathons, as well as numerous 10K's, etc. My average run during a typical week is between 4 and 7 miles at a 7:30 to 7:00 pace once I've moved beyond the initial "warmup" mile to mile & 1/2.
All that being said, I've also undergone 2 arthroscopic reconstructive hip surgeries, so when it comes to rehab-ing and pushing to get back into running shape I have some experience on my side. Try not being allowed to run for nearly two years (cumulative)! It sucks.
And if you want a good laugh, ask Surgicalcric about my running.

See what he says about trying to keep up with my long-legged self.
I've been running heel/toe long distance for so long, and I've tried the other methods and they just didn't take. I can say that I've had a minor change in my footfall/breathing pattern from one breath in every three strides/one breath out the next three strides, to one breath every two strides, etc, but that was after the surgeries. And the longer I run, the faster I get, as well as my stride growing longer. That's where SC's problem comes in...short, little legs. LOL
Proper
fit of running shoe and the proper running shoe, period, are key to the longevity of running, espcially long distance. Athelete's Foot in Fayetteville ran a program for our 18x's that gave them a bigger discount and a full foot eval on the computer via the step pad method. Solved a lot of guys' problems just getting them into the proper shoe. Kept them from inundating me at sick call with foot, knee, back and ITBS issues.
I do appreciate all of the information shared here. I guess everyone has their trends that they keep to, as I have mine, and being an 'old dog' it is difficult to 'learn new tricks' to some degree. I look forward to more shared intel on the running game. Hope some of this is helpful. Thanks.
Mick