Which helped him run a 2 : 08 marathon ( Boston 1994 ) .
American great Bob Kempainen used to crank out around 140 miles per week along with long runs in the 30 - mile range .
Which helped Bob Kempainen run a 2 : 08 marathon ( Boston 1994 ) .
American great Bob Kempainen used to crank out around 140 miles per week along with long runs in the 30 - mile range .