I was allowed to join the Boyscouts 30 days before my eleventh birthday. Two weeks later I earned the mile swim badge , 14 days before my eleventh birthday. I took all the red cross courses right up to and including Water Safety Instructor.
So I know how to swim. being somewaht fatter than I was , I have no idea how my stamina is but its a fact that the more comfortable you are in the water , the slower you burn energy and the less work you have to do to stay afloat and move along.
For one swimming course I took I had to tread water for 2 hours!. After a while you learn that if you are perfectly relaxed and do not worry about keeping your head up , you can float almost indefinitely without moving a muscle.
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