Department of Movement and Sport Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium. huysnele@gmail.com. Department of Movement and Sport Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium. Department of Endocrinology and Metabolic Diseases, Ghent University Hospital, Corneel Heymanslaan, 10, Ghent, Belgium. Department of Rehabilitation Sciences, Ghent University, Corneel Heysmanslaan, 10, Ghent, Belgium. Research Foundation Flanders, Egmontstraat 5, Brussels, Belgium. Department of Nutrition and Dietetics, School of Health Sciences & Education, Harokopio University, El. Venizelou 70, Kallithea, Athens, Greece. Department of Public Health Solutions, National Institute for Health and Welfare, Mannerheimintie, 166, Helsinki, Finland. First Department of Propaedeutic Internal Medicine, National and Kapodistrian University of Athens, 75 Mikras Asias str, Athens, Greece. Growth, Exercise, Nutrition and Development (GENUD) Research Group, Instituto Agroalimentario de Aragón (IA2), Instituto de Investigación Sanitaria Aragón (IIS Aragón), University of Zaragoza, Calle Pedro Cerbuna, 12, Zaragoza, Spain. Department of Paediatrics, Medical University of Varna, 55 Marin Drinov str, Varna, Bulgaria. Clinical Center of Endocrinology, Medical University of Sofia, Boulevard "Akademik Ivan Evstratiev Geshov, 15, Sofia, Bulgaria. Department of Family and Occupational Medicine, University of Debrecen, Egyeterm tér 1, Debrecen, Hungary.