Table 1. Intensity zones for the traditional, metabolic power approaches and HR-based method.
Zones Traditional approach
(km·h-1)		 Metabolic power approach
(W·Kg-1)		 HR based method
(%HRmax)
1 0-6 0-10 < 71
2 6-10.2 10-20 71-78
3 10.2-14.4 20-35.5 78-85
4 HSR
Zone		 14.4-19.8 HMP
Zone		 35.5-55 HHRE
Zone		 85-92
5 19.8-24.9 > 55 > 92
6 > 24.9
MP: metabolic power; %HRmax: percentage of maximal heart rate; HSR: high speed running; HMP: high metabolic power; HHRE: high heart rate exertion.