Hello guys,
I'm using a Fenix 3HR and it seems to me calorie count is on the high side for the low intensity activities and resting. I've also done an Aeroscan test (rest and speeds of 5 to 15km/h on a treadmill). This test measures your pulse and also your oxygen intake and CO2 exhausted.
[TABLE="border: 1, cellpadding: 0, cellspacing: 0"]
[TR]
[TD]Activity[/TD]
[TD]Cal/h[/TD]
[TD]Aeroscan[/TD]
[TD]BMR calculator[/TD]
[/TR]
[TR]
[TD]Sleep (BMR)[/TD]
[TD]85[/TD]
[TD]45[/TD]
[TD]70[/TD]
[/TR]
[TR]
[TD]Home activity[/TD]
[TD]95[/TD]
[TD]53[/TD]
[TD]84[/TD]
[/TR]
[TR]
[TD]Shopping[/TD]
[TD]243.3333333[/TD]
[TD] [/TD]
[TD] [/TD]
[/TR]
[TR]
[TD]Walking 4-5km/h[/TD]
[TD]331[/TD]
[TD]318[/TD]
[TD] [/TD]
[/TR]
[TR]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[/TR]
[TR]
[TD]Running 6:30'/km[/TD]
[TD]704[/TD]
[TD]671[/TD]
[TD] [/TD]
[/TR]
[TR]
[TD]Running 5:30'/km[/TD]
[TD]744[/TD]
[TD]734[/TD]
[TD] [/TD]
[/TR]
[TR]
[TD]Running 4:30'/km[/TD]
[TD]949[/TD]
[TD]912[/TD]
[TD] [/TD]
[/TR]
[TR]
[TD]Running 3:50'/km[/TD]
[TD]1005[/TD]
[TD]no read[/TD]
[TD] [/TD]
[/TR]
[/TABLE]
As you can see on the attached table, calories showed by Aeroscan and Garmin are very similar for walking and up to fast running but differ a lot at rest. Unfotunately, walking & running take at most 2-3hour/day for a normal person, while the rest of 21-22hours is resting or very light activity (office people) so that difference in calorie count makes a huge difference. Overall the difference is very large as you can see >
Example 1: active day
Sleep > 8hrs
Light activity > 14hrs
Walk > 1.5hrs
Running 4:30'/km > 0.5hrs
Garmin > 8*85+14*95+1.5*331+0.5*949 = 2981cal
Aeroscan > 8*45+14*53+1.5*318+0.5*912 = 2035cal
Example 2: resting day
Sleep > 7hrs
Light activity > 15hrs
Shopping, home cleaning ... > 1.5hrs
Walk > 0.5h
Garmin > 7*85+15*95+1.5*243+0.5*331 = 2550cal
Aeroscan > 7*45+15*53+1.5*220+0.5*318 = 1599cal
My Aeroscan test tells me my resting calories are very low for my age and weight (1270/day for me vs 1710/day average). Can we somehow tell Garmin the actual BMR if we have a real test done ?