Even a 400 calorie workout would be pretty impressive for a non-athlete. In gross terms that’s a full hour long swimming session. You’d be hard pressed to do

Even a 400 calorie workout would be pretty impressive for a non-athlete. In gross terms that’s a full hour long swimming session. You’d be hard pressed to do that without first training for it. Conversely, not drinking 2 IPAs gets you to the same place. If you are looking for calorie deficit your intake is much easier to change than your outputs.