Before revision: He documented the success of six competitive runners who followed in one form or another an LSD training regime, sometimes combining a few more strenuous workouts with the regular long slow distance running with weekly mileages ranging from 50-60 to 120–150 miles per week, with marathon personal bests between 2:14 and 2:50 hours.
After revision: He documented the success of six competitive runners who followed in one form or another an LSD training regime, sometimes combining a few more strenuous workouts with the regular long slow distance running with weekly mileages ranging from to per week, with marathon personal bests between 2:14 and 2:50 hours.