"I once wrote that even a football player can train himself to run 10 balls-out quarters, but still won't be in SHAPE. Being in shape means having the aerobic power to run CONTINUOUSLY for 5 miles or 10 miles at a very high percentage of top speed. Any intense training that can be done WITHOUT that kind of basic fitness can be done AFTER that fitness is acquired - and it can be done MORE EFFECTIVELY. " - John Kellogg, from JK's training wisdom, letsrun.com
so basically is he saying that football players, & meathead-type athletes will never be "in shape" because they neglect any sort of quality cardio/aerobic capacity training?
Also, what does he mean by "balls out?" LMAO