Zone 2 is the pace where you can still hold a conversation. It feels almost too easy, and that is exactly the point.

The aerobic base

Training at this intensity grows the mitochondria and capillaries that let your body burn fat efficiently for hours. It is the foundation every endurance athlete is built on.

Finding your zone

ROVA estimates your zones from your heart rate and recent efforts. Aim to spend the majority of your weekly volume here, and save the hard days for real intensity.