There’s this harsh reality for some that being a a fireman involves strenuous  activity. In order to be prepared for those times when hard work is required, we need to do all the things to keep us physically fit. Oddly enough, the most fit person in the firehouse might be the person who blows through a bottle of air the quickest. The only way to extend the length of time you can work in an IDLH environment is to do hard work while on air, learn to breath, train your muscles to breath and maybe after some work, you won’t be the first one to dump a bottle. Maybe…