[stephenbez]

I looked it up and running slowly at a 12 minute per mile pace is about 8 METs, and vacuuming might be around 4 METs so that doesn’t seem to be true.

Also running tends to be more repetitive and pounding on the joints which requires more recovery time than simply vacuuming. I’ve never heard someone get injured vacuuming but I know dozens of people injured from running.

[_Algernon_]

You forget that METs have time in the denominator, so half the MET for twice the time is equivalent.

A mile of slow running is ~11 minutes.