Table 2.

Summary of outcome measures and measurement procedures

Outcome measures	Measurement procedures
Sociodemographic characteristics and health status	Parent questionnaire
Physical activity	Accelerometer (Actigraph wGT3X-BT; 7 consecutive days, 24 h/day):  • Physical activity (light, moderate, vigorous, and moderate-to-vigorous PA)  • Sedentary time  • Sleep (total sleep time, sleep onset latency, sleep efficiency, and wake after sleep onset)
Active commuting to/from school	Child questionnaire
Physical fitness	The ALPHA Fitness Battery:  • Handgrip strength  • Standing long jump test  • 10-m shuttle run tests  • 20-m shuttle run test
Anthropometry	Height, weight, and waist circumference
Sleep health	Accelerometer (Actigraph wGT3X-BT; 7 consecutive days, 24 h/day): total sleep time, sleep onset latency, sleep efficiency, and wake after sleep onset. Children sleep log filled out in collaboration with their parents Sleep Knowledge and Hygiene children questionnaire Pediatric Sleep Questionnaire Pediatric Daytime Sleepiness Scale
Academic achievement	Grades from the official school records for Natural Sciences, Social Sciences, Spanish language, Foreign language (English), Music, Arts, and PE Average grade point from the official school records
Health-related quality of life	KINDL-R questionnaire for children KINDL-R questionnaire for parents