From Answers.com - "Columbia Encyclopedia"

Bannister was asked whether he looked back on the 4-minute mile as the most important achievement of his life. Bannister replied to the effect that 'no, he rather saw his subsequent forty years of practicing as neurologist and some of the new procedures he introduced as being more significant'. His major contribution in academic medicine was in the field of autonomic failure, an area of neurology focusing on illnesses characterized by certain automatic responses of the nervous system (for example, elevated heart rate when standing up) not occurring.

Rodgers training was Swedish Fartlek (speed play) and Interval