I don't know the answer, but from my own experience, I ran the FLM last year, and have been lucky enough to get a place again next year. I've run for years, and started doing free weights on my upper body twice a week to compliment my running. I now find that I have more strength and drive when I run, and I believe the weights really have made the difference. Running is still my number one sport, but the weights simply seem to improve what I fitness I already have. Also, I certainly look more balanced, previously my legs looked perhaps more muscular than my upper body. Of course it's a fine line between extra strength and being toned, but I certainly don't look like Arnie....