It's interesting, but being even casually interested in strength training and muscular hypertrophy means that I read as far as the second paragraph and thought

It's interesting, but being even casually interested in strength training and muscular hypertrophy means that I read as far as the second paragraph and thought "It's probably sleep apnea". It's a relatively common issue in larger individuals, including those carrying a lot of muscle. Probably better than half the heavyweight powerlifters/strongman athletes that I know use a CPAP.