Anyhoo, she said that for the most part the "young, athletic guys" had the most trouble with her class. They "sink like lead bricks" - a direct quote.
Students who had the easiest time? Women, say age 25-40. When I asked, "Why", she said "It's because fat floats." - again, a direct quote.
Oh, so true as much as we females hate it.
My swim partner and I won the water safety instructors competition when we were in college — both of us small, slight females that barely weighed over 100 lbs.
The instructor loudly announced to the entire competition that we won because we were both fat and that “fat floats!” I’ve never forgotten it.