FIT FIRST teen - a cluster RCT evaluating the effects of a 10-week high-intensity exercise intervention for 12-15-yr-old school children.

Objectives: To evaluate the effects of a 10-week thrice-weekly FIT FIRST Teen (FFT) intervention on cardiorespiratory fitness in Danish 12-15-years-olds.

Design: A cluster-randomised controlled study.

Participants: One thousand four hundred and seventeen Danish pupils (51.

Enabling six- to ten-year-old children to self-report their wellbeing and quality of life: development and psychometric investigation of an age-adapted and video-assisted version of the KIDSCREEN-27.

Purpose: Identifying the underlying factors that contribute to poor wellbeing and developing strategies for early intervention are essential for promoting overall wellbeing. Many important aspects of wellbeing and quality of life are subjective experiences and therefore require self-report. The KIDSCREEN-27 questionnaire is widely used for this purpose.

The FIT FIRST 10 dose-response study: evaluation of implementation outcomes.

Introduction: Increasing physical activity (PA) levels among children is critical to mitigate health risks associated with physical inactivity. Schools have been highlighted as ideal setting for promoting PA. However, existing school-based PA programs often face implementation challenges.