Board Thread:Suggestions forum/@comment-26553378-20161021182031/@comment-26553378-20161025114500

SamwiseFilmore wrote: Because your lungs tire quickly. Most likely.

i literally just explained it that way (no offense) basically if you've ever noticed the longer you hold your breath the less amount of air you can seem to exhale (possibly to do with the conversion of O2 and C to CO2, not sure though i am taking bio this year)