If (Yasso) 800s can predict your marathon time, can 400s work for the half?

Many runners are aware of the now infamous Yasso 800s workout in which multiple 800m repeats are run with equal […]

Weekly Workout: Practice pacing with increasingly faster 400s

Race season may still seem far away but it’s never too early to practice your pacing. Today’s workout will improve […]

All 400s