Study: NCT02713438

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Individual Planning
Description: CONTENT: The planning materials and forms have sections: (a) information on the importance of planning, including examples of how planning works and what it affects, (b) instructions of what should be included in a good plan (the when, where, and how components), (c) formulating action and coping plans. Action plans (referring to when, when, and how the individual will act) as well as coping plans (referring to how to overcome potential difficulties, risky situations or temptations to not engage in physical activity).~Each participant forms their plans individually, without consulting the dyadic partner, but discussing the plans with the experimenter.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Dyadic Planning
Description: CONTENT: The planning materials and forms have sections: (a) information on the importance of planning, including examples of how planning works and what it affects, (b) instructions of what should be included in a good plan (the when, where, and how components), (c) formulating action and coping plans. Action plans (referring to when, when, and how the individual will act) as well as coping plans (referring to how to overcome potential difficulties, risky situations or temptations to not engage in physical activity).~Both partners in the dyad jointly form one plan. This jointly developed plan is discussed with the experimenter. The plan focuses on physical activity of only one person in the dyad: the child (parent-child dyads).

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Collaborative Planning
Description: CONTENT: The planning materials and forms have sections: (a) information on the importance of planning, including examples of how planning works and what it affects, (b) instructions of what should be included in a good plan (the when, where, and how components), (c) formulating action and coping plans. Action plans (referring to when, when, and how the individual will act) as well as coping plans (referring to how to overcome potential difficulties, risky situations or temptations to not engage in physical activity).~Both partners in the dyad jointly form one plan. This jointly developed plan is discussed with the experimenter. The plan focuses on physical activity of both persons within the dyad (parent and child) and include some plans for joint physical activity.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Education
Description: CONTENT: The education materials address physical activity and healthy nutrition guidelines for age groups. Participants receive a set of educational materials about types of physical activity (PA), PA intensity, exercise calorie expenditure, strength and endurance training, stretching, and general nutrition guidelines in terms of meal composition, and nutrients, meal frequency. The materials exclude any planning statements.~The education is delivered by the experimenter to a parent-child dyad and discusses individual guidelines for both dyadic partners.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Education
Description: CONTENT: The education materials address physical activity and healthy nutrition guidelines for age groups. Participants receive a set of educational materials about types of physical activity (PA), PA intensity, exercise calorie expenditure, strength and endurance training, stretching, and general nutrition guidelines in terms of meal composition, and nutrients, meal frequency. The materials exclude any planning statements.~The education is delivered by the experimenter to a parent-child dyad and discusses individual guidelines for both dyadic partners.

Intervention type: BEHAVIORAL
Group type: ACTIVE_COMPARATOR
Intervention: Education
Description: CONTENT: The education materials address physical activity and healthy nutrition guidelines for age groups. Participants receive a set of educational materials about types of physical activity (PA), PA intensity, exercise calorie expenditure, strength and endurance training, stretching, and general nutrition guidelines in terms of meal composition, and nutrients, meal frequency. The materials exclude any planning statements.~The education is delivered by the experimenter to a parent-child dyad and discusses individual guidelines for both dyadic partners.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Education
Description: CONTENT: The education materials address physical activity and healthy nutrition guidelines for age groups. Participants receive a set of educational materials about types of physical activity (PA), PA intensity, exercise calorie expenditure, strength and endurance training, stretching, and general nutrition guidelines in terms of meal composition, and nutrients, meal frequency. The materials exclude any planning statements.~The education is delivered by the experimenter to a parent-child dyad and discusses individual guidelines for both dyadic partners.