@lysosm2 500meters takes about 10minutes comfortably, so you can burn 500cal in 50minutes, or probably closer to an hour since there’s no way I’d swim that long nonstop. So it’s about the same as the treadmill
@lysosm2 An hour of treadmill, incline 13, speed 3.2 burns ~500 for me ^_^. Also, for freestyle/frontcrawl swimming, apparently you burn ~100calories per 500meters (I used an online estimator since I’m on a swim team and swim a few thousand every day)