There was a time in my life when, if given a choice between quantity and quality, I’d inevitably have chosen the former. The all-you-can-eat buffet would win over the fancy restaurant every time (and yet my wife still married me). Runners often face the quantity-versus-quality co...

-tuning speed with rest. The strategy works because if you sustain a high training volume for too long, you'll fatigue. But if you reduce volume for an extended period of time, your fitness will begin to erode. Thus, to continuously race well, you must return

a race rather than set a PB, your mile demands will be reduced.Rule #3 Tougher training, lower mileage. Tough track sessions, tempo runs and short repeats are harder to recover from than the same mileage volume, run easily. So when you add quality