Michael Phelps, the Olympic swimmer, also has oversize lungs and a slim build that took him to gold medals swimming. Dunno about my lung size, but when I took to swimming at an early age, I practiced holding my breath. At age 12 at summer camp I upset the councilor when I didn’t surface right away in an underwater distance swim from the dock. I went twice as far as the competition, so our cabin won the privilige of not having to wash dishes that night. Our cabin councilor got stuck with that job, instead.
Without even trying hard, I held an 8.5 on that meter… could have done better, but why bother?