Lydiard was right, but most people do the base phase wrong. It should be ten hours a week at a steady pace. Not 100 miles per week at a slow jog. Cerutty emphasis on hills during the base phase, is better than Lydiard hill phase. That is to do some hill reps once a week during the base phase. Cerutty is one of the most overlooked and one of the most underrated coaches ever in the history of distance running. Lydiard base phase is best to do with some 400m intervals once a week.