Anyobody knows the difference between the filled heart icon vs the outline one on the surge?

[CLTSurge]

While exercising I see sometimes the heart icon shows completely filled (white) but sometimes just an outline. It does both while still showing a heart rate so not sure what the difference is.

[wmchapman · Accepted solution]

When your heart rate is below 50% of maximum, your heart rate may still be elevated but not enough to be considered exercise (just an outline heart).

Fat burn zone, which means your heart rate is 50 to 69% of maximum, is the low-to-medium intensity exercise zone and may be a good place to start for those new to exercise. It’s called the fat burn zone because a higher percentage of calories are burned from fat, but the total calorie burn rate is lower

(filled in heart).

Cardio zone, which means your heart rate is 70 to 84% of maximum, is the medium-to-high intensity exercise zone. In this zone, you're pushing yourself but not straining. For most people, this is the exercise zone to target.

Peak zone, which means your heart rate is greater than 85% of maximum, is the high-intensity exercise zone. The peak zone is for short intense sessions that improve performance and speed.

Great question @CLTSurge, More detail here. Welcome to forums. Keep moving!

[CLTSurge]

Great. thanks for clarifying!