Zone
Pace
Recovery
--:--
Very easy, active recovery run
Easy
--:--
Comfortable aerobic pace, recovery run
Long
--:--
Long run pace, slightly slower than marathon pace
Marathon
--:--
Target marathon pace
Threshold (LT2)
--:--
Lactate threshold, comfortably hard effort
VO₂ Max
--:--
High-intensity intervals to improve VO₂ max