Gents do you not think there is a bit of a difference between a racing snake jockstrapper who always has time off for sport but comes down with sports related injurys when the going gets tough etc etc and yon fat liney who can fix umpty billion jets in minus 300C but carries some freight?
There is a bit of middle ground - the average guy who does the average phys and keeps it together..
Just bloody do it - exercise makes you fell good.