when swimming, do you exhale once you stroke with your right arm? assuming you breath on your left or do you exhale when you are rotating to your breathing side, tried exhaling when my right arm was in the pull-phase of the stroke and felt i was sinking and my 400 times were 10 secs slower but effort was the same but didnt feel out of breath afterwards. in the past (10+ yrs) ive always exhaled after my right arm has finished stroking. normally would have gas after the workout.