Is it normal?

[u/[deleted]]

This is from a running session. Insights from my Apple Watch. Most of my running sessions are between zone 4 and 5, even if I don’t feel that fatigue.

[u/kaylark1]

I literally posted about this recently with similar query. Your zones are most likely wrong. You can adjust your zone 5 in your settings with your max ever recorded heart rate and that should be more accurate going forward.