9-day Cycle "Meb model" for Masters Runners with Two Easy Days Between Hard Workouts

Doing a hard workout without sufficient recovery is one reason Masters runners plateau and are more susceptible to injury. In his late 30s, Meb Keflezighi realized he could no longer get the most out of hard workouts on only one day's rest. Shifting to a 9-day cycle allowed two recovery days between hard workouts. Only with the extra rest could he get the full benefit from the hard tempo and interval days that he had squeezed into a single week as a young man. The result: Meb's 2014 Boston Marathon win.