running uses a lot of quadriceps muscle fibres, and this is the best way to build the quadriceps," Rosa told me recently. "In Italy, we use the gym also, but the Kenyans do not have any gyms, so we run hills."Medical research isn't exactly brimming

:07:14, it was still well outside Paul Tergat's world record of 2:04:55.Waitz didn't know it at the time, but there was a simple reason for her collapse. Her quadriceps muscles – the big group of muscles just above the knee – had been punished beyond their limit by too

Amby Burfoot is Executive Editor of Runner's World USA, and the 1968 Boston Marathon winner Imagine that there was an exercise programme that could guarantee to get you in shape with only three identical 30-minute exercise sessions per week. I

, enjoyable (and effective) way to run. It’s worth a try, isn’t it? Amby Burfoot is Editor of Runner's World US.