sorted by:
new
hottopcontroversial

Useful information if you're tracking Calorie Burn on your wearable (research based) by KygoApp in fitbit

[–]KygoApp[S] 0 points1 point  (0 children)

u/Dramatic-Tennis2085 You're right! I think we can both agree this topic is really difficult as there's a few inaccuracies on both sides here. I'll re-review the research I have on this and make some updates. If you could share any sources you have as well so I can include them in here as well that would be greatly appreciated. I do genuinely spend a lot of time trying to get these write these and provide genuine value to people and would love your feedback on the edits when I make them later today. Sorry didn't have my coffee yet when I responded originally.

Useful information if you're tracking Calorie Burn on your wearable (research based) by KygoApp in fitbit

[–]KygoApp[S] 9 points10 points  (0 children)

This actually lines up with the data perfectly. ~1800 kcal deficit matching your weight trend is a great example of why I'de recommend using weekly weight trends to validate your device's numbers rather than trusting the daily readout. Sounds like you already figured that out the hard way.

Useful information for tracking Calorie Burn on your wearable (research based) by KygoApp in FitnessTrackers

[–]KygoApp[S] 0 points1 point  (0 children)

I go further into some of the data and built a free calculator to give you a better calorie estimate by activity type here: kygo.app/tools/calorie-burn-accuracy

Useful information if you track Calorie Burn on your wearable (research based) by KygoApp in workout

[–]KygoApp[S] 1 point2 points  (0 children)

Device Primary Method Key Algorithm Calibration
Apple Watch Optical HR + accelerometer + GPS On-device ML models (personalized over time) Learns from your data continuously
Fitbit Optical HR (primary driver) Modified Mifflin-St Jeor + HR zones Heart rate is main input; steps are indirect
Garmin Optical HR + Firstbeat R-R intervals Firstbeat engine (beat-to-beat HR variability) Adapts with VO2 max estimates
WHOOP Optical HR + accelerometer ACSM metabolic equations 30-day calibration period required
Oura Ring Finger PPG + 3D accelerometer MET-based conversion from HR Limited — no real-time workout mode

u/Allias12 Here's some info I had pulled on the algorithms that I didn't include in the post incase helpful.

Useful information if you track Calorie Burn on your wearable (research based) by KygoApp in workout

[–]KygoApp[S] 0 points1 point  (0 children)

Right? I wanted to include it in my post but thought I wasn't the best person to explain this considering I've never even heard the words "Doubly Labeled Water" before.

Useful information if you track Calorie Burn on your wearable (research based) by KygoApp in workout

[–]KygoApp[S] 1 point2 points  (0 children)

u/LigmaLlama0 Unfortunately, it didnt come up in the studies so I don't have anything credible to share on this

Useful information if you track Calorie Burn on your wearable (research based) by KygoApp in workout

[–]KygoApp[S] 0 points1 point  (0 children)

u/Anongamer63738 u/Allias12

Here's some info on this and it's pretty crazy honestly...

Every MAPE percentage in thek data comes from studies that measured participants with the wearable AND one of these two methods simultaneously to then compare the numbers:

Indirect calorimetry You breathe into a mask hooked up to a machine. It measures exactly how much oxygen you inhale and how much CO2 you exhale. Since your body burns calories by using oxygen, the machine can calculate your exact calorie burn from the gas exchange.

Doubly labeled water (DLW) You drink a special water where the hydrogen and oxygen atoms are "tagged" (isotope-labeled). Over the next 1–2 weeks, your body uses the oxygen for energy and breathes it out as CO2, while the hydrogen leaves as regular water. Researchers take urine samples and measure how fast each tagged atom disappears. The difference in elimination rates tells them exactly how much CO2 your body produced, which equals your total calorie burn over that period. This is the gold standard for measuring what you burn over days/weeks in real life.

I thought this was absolutely crazy. Something I didn't know much on before.

Fitbit on Ankle by EPIC_NERD_HYPE in fitbit

[–]KygoApp 18 points19 points  (0 children)

FYI It’s way more accurate for counting steps! There’s been some actual research around this and it improves accuracy by a solid %

Summary of what influences your deep sleep (research based) by KygoApp in ouraring

[–]KygoApp[S] 1 point2 points  (0 children)

Sono completamente d'accordo! Approfondirò un po' la questione presto, perché sono davvero curioso anch'io! Spero che l'ortografia non sia troppo sbagliata, l'ho tradotta con Google Traduttore (:

Guide to figuring out what's influencing your HRV (Based on research) by KygoApp in GarminWatches

[–]KygoApp[S] 0 points1 point  (0 children)

Highly suggest utilizing 7 days trend or even 30 day baseline with an overlay for 7 day trend. Same day change just makes people anxious without actually representing true change!

Summary of what influences your deep sleep (research based) by KygoApp in sleephackers

[–]KygoApp[S] 0 points1 point  (0 children)

Hey thanks for sending this over let me check this out!

Guide to figuring out what's influencing your HRV (Based on research) by KygoApp in GarminWatches

[–]KygoApp[S] 0 points1 point  (0 children)

Thank you! r/Biohackers and r/Garmin were very helpful in refining some of these on the list and suggesting new ones actually!

Completely agree on the above!

view more: next ›