Ah so maybe the Garmin calculates the basic at rest calorie burn. Think my Apple Watch calculates 'active calories' - so only calories burned above those the body uses to maintain itself at rest. So my daily calorie average is about 1000-1200 with a decent 1hr workout at the gym plus 10k steps etc.
The Garmin also does active calories too although I accept that I need to up these (and 2 hour hilly walk today was a decent enough contribution) while avoiding using Belgian sports drink to rehydrate afterwards.
Ah so maybe the Garmin calculates the basic at rest calorie burn. Think my Apple Watch calculates 'active calories' - so only calories burned above those the body uses to maintain itself at rest. So my daily calorie average is about 1000-1200 with a decent 1hr workout at the gym plus 10k steps etc.