Hakamäki, MattiJAMK University of Applied Sciences--Syväoja, Heidi JJAMK University of Applied Sciences, LIKES Research Centre for Physical Activity and HealthResearcher, Senior researcher-Skog, HannamariUniversity of Eastern FinlandDoctoral researcherAdolescence, Brain Health, Physical Activity, Screen time, Transcranial magnetic stimulationKulmala, JanneJAMK University of Applied SciencesSpecialist, Physical Activity Monitoring-Asunta, PirittaJAMK University of Applied SciencesChief Specialist, researcher, Project coordinator, University teacher / Adapted physical activity, PhD student-