Another anecdote for these. I started running regularly a year or so ago. I'm no natural athlete, and even with relatively short runs of just a few miles, I would struggle with knee pain. (I'm quite tall.)

After reading some of these articles, I decided to give the five fingers a try. At first, my hamstrings and feet were so tired I could hardly walk after running. (You don't realize how many muscles you have in your feet, because you don't use them unless you land on the balls of your feet.)

Now, at about the 1 month point, my hamstrings have strengthened, I still feel a lot of soreness in my feet, but the issues with my knees are completely gone.

Maybe placebo, I know, but I don't mind placebo if it works...