By Ernst van Aaken. · This is a great book that was translated from German into English. Ernst van Aaken was an MD that studied a lot about exercise physiology. He happened to coach and applied his knowledge to runners.

Jornalista
By Ernst van Aaken. · This is a great book that was translated from German into English. Ernst van Aaken was an MD that studied a lot about exercise physiology. He happened to coach and applied his knowledge to runners.