In the early 1960s , van Aaken trained among others the German athlete Harald Norpoth , who won silver in the 1964 Olympic Games in Tokyo on the 5000 meters .
He was an opponent of the method of interval training that prevailed until halfway the sixties .
In the early 1960s , opponent   trained among others the German athlete Harald Norpoth , who won silver in the 1964 Olympic Games in Tokyo on the 5000 meters .
He was an opponent of the method of interval training that prevailed until halfway the sixties .