Workout overview

Distance: 5.226 km

Zone distribution

Z1: 134 m

Z2: 2680 m

Z3: 804 m

Z4: 0 m

Z5: 1608 m

Z6: 0 m

3%
51%
15%
0%
31%
0%

Quarter-mile (400m) repeats are a core part of any focused speedwork. It is long enough to be hard but short enough to be repeatable. These efforts require great aerobic fitness but also have a core anaerobic component that you will rely on during a 10K race.

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