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Table 1 Classification of physical activity by three categories

From: Reliability and validity of two frequently used self-administered physical activity questionnaires in adolescents

Category Description
  ActiReg WHO HBSC frequency question WHO HBSC duration question IPAQ
Low activity METs
< 3
Exercise one day a week or less, so much that you get out of breath or sweat One hour a week or less of exercise, so much that you get out of breath or sweat Individuals who do not meet the criteria for moderate-intensity and vigorous-intensity activity categories are considered inactive.
Moderate activity METs
3–6
Exercise 2–3 days a week, so much that you get out of breath or sweat 2–3 hours a week of exercise, so much that you get out of breath or sweat • 3 or more days pr. week of vigorous activity, at least 20 minutes per day OR
  • 5 or more days pr. week of moderate intensity activity or walking, at least 30 minutes per day OR
     • 5 or more days pr. week of any combination of walking, moderate-intensity or vigorous-intensity activities achieving a minimum of at least 600 MET-min/week.
High activity METs
> 6
Exercise four days or more a week, so much that you get out of breath or sweat Four hours or more a week of exercise, so much that you get out of breath or sweat • Vigorous-intensity activity on at least 3 days pr. week and accumulating at least 1500 MET-min/week OR
     • 7 or more days pr. week of any combination of walking, moderate-intensity or vigorous-intensity achieving a minimum of a least 3000 MET-min/week.
  1. METs = Intensity of activity compared to resting energy expenditure