Lung function
Hi Ulster, yes you may well be right.
My own experience in both military and fire service basic training was that after 6 weeks persons were significantly fitter and after I started using a heart rate monitor in the early 90s I could plot certain improvements. Peak flow was not recorded weekly then and I know as I got older it was adversly affected.
My basic point is that for an initial medical one needs to be what we used to call A1G1Z1 and be as fit as possible before submitting to the assessment.
6 weeks of intensive exercise would put someone in a better position to do well and would have the benefit of feeling and maybe even recording his own increasing level of fitness.
My anecdotal evidence of increased fitness does not equate to scientific or medical evidence and I hope an expert may add something to answer his reasonable question. But if not, should he not get using that aerobic system ASAP and be better prepared?