Strange.  I can't image running heel-to-tow on any distance.  While I usually walk heel-to-tow -- running this way just feels painful.  By landing on the front part my muscles act like a spring upon impact.  I find mid-foot strikes barely acceptable.<p>Edit: Re-read the article.  I guess I just ran in cheap "minimal footwear" all my life.  Now is this a good or a bad thing?