Multi-tier isn’t the same thing as the five pace....idiot, Peter Coe defined the five tiers as aerobic conditioning, Lactate/ Ventilatory threshold (Americans call tempo), Max Vo2, Lactic Acid threshold, and comprehensive fitness (flexibility, plyos, weight and circuit training). What do the Ethiopians do? Aerobic running, tempo runs, Vo2 intervals, hills, and circuits. What do the Kenyans do? Aerobic running, tempo runs, Vo2 intervals, hills, and circuits. What do the Moroccans do? Aerobic running, tempo runs, Vo2 intervals, hills, and circuits. The volume in which they decide to do what is culture based. Ethiopians like to run far. Kenyans like to run three times a day, Moroccans like to run fast, but they all include every tier, who started the idea? The brits.