I wear a Garmin Vivioactive HR+ smartwatch which has a heart rate monitor. It responds slowly to HR changes so I don’t always take it at its word when I’m training (for that I use a polar chest strap) but I trust it for longer term monitoring.
I have noticed after a workout as I’m working on cleaning up and recovery my HR bottoms about at about 60% of my usual resting heart rate. The dip is short-lived and occurs only once/session and I don’t feel it. This is an observation I see on nearly all workouts so I believe it to be a real reading and not an artifact from my smartwatch. If you have a similar setup, do you too see a similar bottom out of your HR?
Workout of today (closing out week IV of Sweet Spot Base Mid-volume) was Eclipse a sweet spot workout with a 3x20 work session and the usual warmup, rest intervals and an extended cooldown.