I've always felt that 40 minutes was the perfect length of time for a run. Even at the very beginning of my running days, 20 to 30 minutes felt like not quite enough and an hour was, well, simply ...

This title is impossible! You can’t just have a perfect run. Even if you sleep well, eat all the right things, just had a rest day and are wearing new shoes. I have had all these and almost never does ...