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Power zones, how is this possible?!

Miky over 1 year ago

Done 13×400m at 3:24/km pace.

Why 0% Z5?!

0 9388573 over 1 year ago

I'm also curious about that. During intervals sessions, I almost never reach Zone 4 and Zone 5.

I don't use an HRM strap or a pod.

Do I need to manually set the power zones? or is the wrist-based running power feature broken?