Most #fitness trackers use METs to calulate calorie expediture. This makes it fairly difficult to calculate the MET for #rucking, since it varies on #ruck weight, movement speed, and incline percentage.

As an estimate one can use hiking cross country[^1] at 6.0 MET and taking the difference of hiking hills, 12 lb pack[^1] and hiking up hill[^1] one sees that every 2 lbs adds 0.1 MET.

$$ MET = 6.0 + (extra weight in lbs) / 20 $$

For example, let a person carry a 45 lbs ruck, then the MET is

$$ MET = 6.0 + 45 / 20 = 6.0 + 2.25 = 8.25 $$

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