Table 1.

Activity intensity descriptions used in various physical activity questionnaires.

Questionnaire	Intensity description examples
California Health Interview Survey 2009 Adult Questionnaire	Think about vigorous activities you did in your free time that take hard physical effort, such as aerobics, running, soccer, fast bicycling, or fast swimming. Again, do not include walking. During the last 7 days, did you do any vigorous physical activities in your free time?
Neighborhood Physical Activity Questionnaire	In a usual week, how many times do you do moderate-intensity leisure-time physical activities that do not make you breathe harder or puff and pant?
National Health and Nutrition Examination Survey Physical Activity and Physical Fitness Physical Activity Questionnaire (version 1998)	Moderate activity: Over the past 30 days, did you do moderate activities for at least 10 min that caused light sweating? (brisk walking or bicycling for pleasure)
Health-enhancing physical activity and Office in Motion Questionnaire	Think about moderate physical activities that make you breathe somewhat harder and may include continuous walking, hiking, dancing, gardening, or sport activities. Currently, do you do any physical activities that make you breathe somewhat harder?