That's how many calories WebMD says I burn on my daily bike commute.
I'd never realized it could be that much. I don't actually time myself, so it may actually be a few more (up to 411) if I'm going faster. I'll assume the lower number though.
There are 3500 calories in a pound, so at this rate if I bike 10 days (9.3 days to be precise, but it's pretty hard to bike 0.3 round trips to work) and otherwise have a neutral food intake, I'll lose a pound.
Seems like another good reason to bike to me! I'm trying to lose 12 pounds from where I was at the beginning of this year. I'm halfway there now... only 55 round-trips to work to go - which would happen in late August if I keep up current patterns. I'm hoping it doesn't take quite that long - and now that I know how many calories I'm burning, perhaps it won't!