Quality Evaluation of Free-living Validation Studies for the Assessment of 24-Hour Physical Behavior in Adults via Wearables: Systematic Review

Marco Giurgiu   ^{1, 2} , PhD ;   Irina Timm   ¹ , MSc ;   Marlissa Becker   ³ , MSc ;   Steffen Schmidt   ¹ , PhD ;   Kathrin Wunsch   ¹ , PhD ;   Rebecca Nissen   ¹ , BSc ;   Denis Davidovski   ¹ , BSc ;   Johannes B J Bussmann   ⁴ , PhD ;   Claudio R Nigg   ⁵ , Prof Dr ;   Markus Reichert   ^{1, 2, 6} , PhD ;   Ulrich W Ebner-Priemer   ^{1, 2} , Prof Dr ;   Alexander Woll   ¹ , Prof Dr ;   Birte von Haaren-Mack   ⁷ , PhD

¹ Department of Sports and Sports Science, Karlsruhe Institute of Technology, Karlsruhe, Germany

² Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany

³ Unit Physiotherapy, Department of Orthopedics, Erasmus MC, University Medical Center Rotterdam, Rotterdam, Netherlands

⁴ Department of Rehabilitation Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, Netherlands

⁵ Health Science Department, Institute of Sport Science, University of Bern, Bern, Switzerland

⁶ Department of eHealth and Sports Analytics, Faculty of Sport Science, Ruhr-University Bochum, Bochum, Germany

⁷ Department of Health and Social Psychology, Institute of Psychology, German Sport University, Cologne, Germany