What should you do in regard to the intensity of your workout if your post-exercise heart rate is above either the five- or 10-minute levels?

Warm up-cool down: your pulse should drop 15-20 bpm after 10 min. of cool down.

Cut back, review: high heart rates in interval training usually is an invitation to drop back a few notches and continue, waiting for your body to catch up with your enthusiasm. Takes longer as older. That said, if you are 'hitting a wall', strongly consider a checkup with qualified medical person.

Exercise: If you're concerned about these numbers consult your dr. About the meaning vis a vis your workout, making a recommendation only on the info here is inappropriate, not that simple.