Runner 2 Calorie Counts not matching TomTom Connect App counts
I have a Runner 2 Sports watch with HR. I used to just use it for when I was doing sports, but I've started wearing it all day to estimate total mobility/energy expenditure.
My BMR is in the region of 2000 Calories. I generally do between a long (2-4 hour) zone 2 indoor cycle, or a short (20-45 min) z4/5 interval cycle each morning - I then walk to work (30 mins each way) - and while my job is not manual labour, I am not completely sedentary.
I have a target of 3500 calories burned each day - which if I've done a long ride gets alerted by my watch early/mid afternoon. If I've done a short ride it alerts in the evening once I've walked home from work, and if I've not cycled won't alert at all - all will alert just before I go to bed, depending on how busy I've been at work.
This all seems broadly accurate - however, when I sync my watch with the App - the webpage shows a much lower total energy expenditure per day.
E.g. Monday I did a 3 hour ride, that shows as 2300 calories burned, I then walked to work - had a busy day up and around, walked home, walked to the shop etc... the 3.5k target alert happened in the afternoon, then by the end of the day when I went to bed, the watch was showing 4000+ calories, which would seem broadly accurate?
Now I've synced the watch it's showing my total expenditure for Monday to be 3500 pretty much bang on - which seems on the low end. My cycle is still showing as 2300k - which means I've only burned 1200 the rest of the day - which would be below my BMR, and doesn't account for walking to work and being generally active?
I'm *guessing* that the App/webpage is doing further calculations of some sort when syncing to get a 'more accurate' figure - but I'm not sure exactly what? Obvs with my long cycles they are in Z2 - so I thought the watch might be over egging the calories burned on that, which are then adjusted down on sync - but the individual rides still showing as per the watch seems to rule this out...?