I feel as though my heart rate is not tracked correctly, displaying it too low. As above for example, very strenuous exercise but barely going to 130bpm.

I have AW8 with iPhone 13 and updates iOS on both. I can barely enter zone 3 training for example, no matter how strenuous is my training. Using native workout app.

I wear the watch tight above the wrist bone, and clean it often.

Resting heart rate seems accurate, during exercise not.