Appendix (1)
Activity types measured, their seasonal adjustment factors (months
per year), and their intensity classification (moderate vs vigorous):
bicycling 9/12, moderate; swimming, 5/12, moderate; gymnastics/ballet,
12/12, moderate; dancing 12/12, moderate; table-tennis 12/12, moderate;
soccer 9/12, vigorous; ball games (e.g. volleyball/basketball) 12/12,
vigorous; jogging/running 9/12, vigorous; roller-skating/skateboard,
6/12, vigorous.

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