1. 80/20 zones are different from Stryd zones, close, but not close enough that you can interchange them. Our Getting Started guide will walk you through how to setup our 80/20 zones from your individual thresholds.
2. Yes, particularly since you have a power meter, it’s a bit easier on trails to maintain appropriate zones. Main tip: don’t hesitate to walk the hills. This is an appropriate strategy for race day as well. Keep your arm movement minimal, and lead with your knees on those hills.
3. We do have power-specific Ultra plans, and all our Ultra plans are created with the assumption to be performed primarily on trails.