Does marathon training kill your speed?

If North America’s most successful female marathoners are any indication, moving up to the marathon doesn’t have to mean sacrificing speed at shorter distances

How intervals of increasing duration can increase performance

Spring is a great time for speed training and a few faster efforts now can really pay off later on. […]

Should you train by time or distance?

What’s the difference between running one kilometre repeats in five minutes and running five minute repeats and covering one kilometre?

All intervals