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VO2 max and active calories

2814858
over 2 years ago

Hello, is the vo2 max estimated by the fenix 7 taken into consideration to estimate the active calories burned during the day? The higher it is, the more calories you burn during the day 

  • 0 over 2 years ago

    I didn’t find public information about the algorithm Garmin uses for the estimation of calories burn.

    - typically, calories expenditure is linked to movement intensity and duration, estimated from HR and accelerometer data (eg to estimate strides),

    - typically, calorie expenditure is not very accurate (wrist based fitness trackers can be 40-80% off

    www.cnet.com/.../

    - formulas exist to improve accuracy by incorporating V02Max estimates on top of HR,

    www.shapesense.com/.../heart-rate-based-calorie-burn-calculator.shtml

  • 0 over 2 years ago in reply to Etupes25

    This got me thinking, when Garmin says calories burnt does it mean from fat and carbohydrate or just cars burnt ?  I would have though since garmin knows your lactic threshold it should be able to tell how much fat was burnt vs carbs. This is important as you need to replace carbs to keep going whereas fat I'm sure i'm going to have enough ;) I'd also like to know a breakdown of how much of each was burn then i can factor in recovery calories.

  • 0 over 2 years ago in reply to AndrewAU
    AndrewAU said:
    does it mean from fat and carbohydrate or just cars burnt

    It just means calories, regardless of the source of energy used to generate the effort.

    Before an effort, some still go for carb loading in relation to tapering, but it really should be a macro nutrient balance during your training.

    it is possible to estimate how much fat vs carbs provided the energy for workout. But this split is not going to be very useful during the workout or after the workout:

    During the workout, you will need to fuel with carbs depending on your overall weight for efforts during more than ~90mn regardless. This is to account for digestion and absorption.

    news.sanfordhealth.org/.../

    The split information is not going useful after the workout either, as you should have a balanced diet post effort aligned with the type of effort you typically do.

    nutritionhealthworks.com/.../

    Most long duration (>90mn) are going to be before the second ventilatory threshold and therefore will always be a mix of fat and carb usage. The first ventilatory threshold (often called the aerobic threshold) is the point where carbs burning kick in in earnest because of the recruitment of type II muscle fibers.. The lactate threshold (often a proxy for the second ventilatory threshold, called the anaerobic threshold) is the point where the source of energy is only carbs.

    www.tymewear.com/.../thresholds-the-key-to-maximum-training-benefit

  • 0 over 2 years ago in reply to Etupes25

    Since I noticed that garmins tend to underestimate the daily calorie consumption by 10-20% I was wondering if the vo2 max had something to do with it