MET (metabolic equivalents of task) tells you how much harder you exercise compared to resting on sofa. In practice, MET-values makes possible to compare your effort between different exercise. sleeping 0.9 watching television 1.0 writing, desk work, typing 1.8 walking, 1.7 mph (2.7 km/h) 2.3 walking 3.0 mph (4.8 km/h) 3.3 home exercise, light or moderate effort 3.5 walking 3.4 mph (5.5 km/h) 3.6 bicycling, 10 mph (16 km/h), leisure, 4.0 bicycling, stationary, 100 watts, light effort 5.5 jogging, general 7.0 calisthenics (e.g. pushups, situps, pullups,jumping jacks), heavy, vigorous effort 8.0 running jogging, in place 8.0 martial arts fight 10.0 Check more info e.g. from Wikipedia http://en.wikipedia.org/wiki/Metabolic_equivalent