Jorma Tynjälä
3PUBLICATIONS
7CO-AUTHORS
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Publications (3)
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|Mar 06, 2021
Problematic Social Media Use and Health among Adolescents.Leena Paakkari, Jorma Tynjälä, Henri Lahti
|Apr 03, 2019
Does Sleep Mediate the Association between School Pressure, Physical Activity, Screen Time, and Psychological Symptoms in Early Adolescents? A 12-Country Study.Ann Vandendriessche, Ariane Ghekiere, Jelle Van Cauwenberg
|May 06, 2017
Ownership and Use of Commercial Physical Activity Trackers Among Finnish Adolescents: Cross-Sectional Study.Kwok Ng, Jorma Tynjälä, Sami Kokko
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