[jbrande]

I do not know what you do in the gym but the delta between resting and lifting seems way too high for lifting and even a moderate warm up.

[HorizonXP]

100% agree, this is why I doubt the number. I'm moving more, since I'm not in the house, and I'm walking around the city and taking the bus.

No warmups, just straight lifting weights (bench press, deadlifts, squats, plus a few accessory exercises), and stretching.

There is the delayed caloric burn that occurs from weight lifting, but I doubt the Fitbit is accounting for that.