Alternating Hard/Easy Weeks

The Hard/Easy definition of weekly running is different from Hard/Easy daily runs. My Easy daily run is currently 2.0 mi. This distance neither causes an increase or decrease in my fitness. My Easy week is three Hard and three Easy runs of the same distance. My Hard daily run is currently 2.5 mi. My Hard week involves incrementally increasing my weekly mileage by increasing my daily Hard run by 200 meters. A Hard week has increasing mileage and an Easy week has no mileage increase. My weekly increases are 5%, well below the 10% increase injury threshold.