Definition of PA according to IPAQ79
Category 1	Low intensity	This is the lowest level of physical activity. Individuals who do not meet the criteria for the categories 2 or 3 are considered low intensity/inactive.
Category 2	Moderate intensity	Any one of the following 3 criteria: • 3 or more days of vigorous activity for at least 20 minutes per day OR • 5 or more days of moderate-intensity activity or walking for at least 30 minutes per day; OR • 5 or more days of any combination of walking, moderate-intensity or vigorous intensity activities achieving a minimum of at least 600 MET-min/week.
Category 3	High intensity	Any one of the following 2 criteria: • Vigorous-intensity activity on at least 3 days and accumulating at least 1,500 MET-min/week OR • 7 or more days of any combination of walking, moderate-intensity or vigorous intensity activities achieving a minimum of at least 3,000 MET-min/week

MET-min = Metabolic equivalent of task-minutes