Hiya, friends. All numbers hypotheticals here for the sake of convenience.

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Say I am in the gym for exactly 90 minutes and I take exactly 120 second rest between all sets and all exercise changes. I perform 25 sets in 1 session, meaning I take 24 x 120 second rests, which is 48 minutes. This means 42 minutes involved in actually lifting weight, or 46.6% of the 90 minutes.

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The Apple Watch, assuming I am burning a brisk walk-equivalent for all 90 minutes, estimates by burnt calories at 1,000. Would it be most accurate to log 46.6% of this (466kcal) into a calorie tracker such as MyFitnessPal?

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Although I don't personally aim to eat back all burnt calories at the end of the day it does give me a little freedom with condiments and sides. For my TDEE, I’d prefer to work with Sedentary and manually add extra calories, rather than simply work with a 1.2x Light or 1.4x Moderate Exercise base TDEE multiplier.

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Cheers for your insight!