Co-physical activity
Co-PA includes all types of PA that involves “active play”, and is jointly performed by the father and the child (e.g. playing soccer together, rough-and-tumble play, cycling). Co-PA was measured using a 7-day recall diary, investigating all physical activities fathers and children performed together in the last seven days [Based on this, data were retrieved for co-PA, which consisted of co-PA performed 1 on 1 (father with the participating child) and co-PA conducted with additional family members. Total co-PA was then calculated as the sum of co-PA conducted 1 on 1 + co-PA conducted with additional family members. Furthermore, co-PA was also calculated separately for standard weekdays (which cover all weekdays except Wednesdays), Wednesdays (calculated as a separate variable because it is only a half-day school for the children) and weekend days. All co-PA variables were (calculated and) expressed in average minutes/day.