8/ 26.2 PREDICTOR
WHY ‘Long runs are great marathon predictors because a marathon is just one really long run,’ says Henwood.
HOW Run at your marathon pace for 10-14 miles of a 20-mile long run. Take the average mile time from your race-pace miles and multiply it by 26.2. Do this run five weeks before race day for intermediate runners; and a second time two weeks later for advanced runners. (Beginners should skip this workout and use their longrun pace as a goal race pace.)