Okay.
Cite something that proves otherwise then.
Okay.
Cite something that proves otherwise then.
TR or power based calories estimates are based on measurement of your actual work done. Most calculators uses a 25% metabolic efficiency and that is the biggest error in the estimate assuming that you have an accurate power measurement.
Most online calorie estimators are based on MET (metabolic equivalent). The accuracy and applicability of MET is questionable depending on what you are doing. Read up on the supporting documentation on Compendium of Physical Activities. Garmin (and Strava?) estimate using heart rate is based on FirstBeat. Itās better than MET but just.
exactly. The compendium of physical activity has information on how they compiled the MET data.
Where I have power, I use the kj/ Kcalories.
Without power, Iāve had the expected weight loss/ kept at maintenance using Garmin with HRM, for rides without power and other activities (running and walking mainly). That was with the 310xt, 920xt and now with the 245 wrist based HRM.
My Wahoo Bolt can be a 1000 calories higher than my Garmin watch for a 4 hour ride, both based purely on Heart Rate, with the same data/ zones (actually, if anything the Wahoo is a lower weight, as my Garmin is always that days weight). For my non-power rides I run my Garmin 245 for My Fitness Pal, and is one of the reasons Iāll upgrade to the 530, not the Roam, when the time comes. The Bolt doesnāt even give calories without Heart Rate, even with power!
The thing with anything Heart Rate based, as well as the other possible fluctuations, you have to have semi accurate zone setting. Max heart rate in particular, not just some formula.
Hereās a nice review from back when the scientific debate was still ongoing (in part due to the work of the criminal Poehlman, who skewed everybodyās thinking in this area the way Wakefield did about the safety of vaccines):
As you will read, even when measurable the additional post-exercise energy burn amounts to only 6-15%ā¦IOW, too small to worry about when attempting to estimate energy expenditure during exercise itself, even from power data.
I donāt know if Iād call 15% too small to worry about.
You do realize how much slop there is in estimating energy expenditure during exercise, donāt you?
Iām saying that a 15% extra calorie burn post exercise is not ātoo small to worry aboutā and can add up over time. Nothing to discount.
And Iām saying that if you canāt estimate energy expenditure during exercise to better than +/- 20%, even using power data, why are you worrying about a smaller increase post-exercise?
I record my TR workouts on my Garmin Fenix 5 watch as well as the TR app. The calorie calculations on the fenix are always within a couple of percent of the TR number so Iām pretty happy theyāre correct.
Thanks Dave, this was a great explanation.
No but if you go to the power data fields there is one for KJ which displays the work done. As this is lower and arguably more accurate than HR based calories, I choose to display this on my bolt.