The lowest-MET activity in the gym/sport categories โ but it's movement you're already doing anyway.
Cleaning involves frequent light-to-moderate movement โ reaching, bending, scrubbing, carrying โ spread across a sustained period rather than one continuous motion. No single action is demanding, but the constant low-level activity keeps your energy use steadily above resting for as long as the chores last.
At 3.0 MET, an hour of brisk cleaning burns a meaningful amount of energy simply because it's sustained, not because any one task is hard.