As an alternative to the workout “Keep an Even Pace”, this workout is geared towards maintaining an even heart rate. I like to do this workout during recovery runs and try to keep my heart rate in a specific zone or within a percentage of my max heart rate.
This is not as easy as it seems and will force you to either go slower or faster to stay within that zone. I like to do this on recovery runs to force myself to slow down to my easy pace so that I can be ready for my hard workouts and avoid turning my easy days into a race.