Work meeting took place on 27th of April 2017 at the Department of Health Psychology, Faculty of Medicine, UPJŠ in Košice within the Health Behaviour in School-aged Children (HBSC) study activities as part of collaboration on objective measurement of physical activity and fitness at the next collection of data. The meeting was attended by external guests from Department of Physical Education and Sport, UPJŠ (dr. Peter Bakalár, dr. Zuzana Küchelová), Department of Public Health, Jessenius Faculty of Medicine in Martin (Eliška Štefanová) and Department of Physical Education and Sport, Matej Bel University in Banská Bystrica (assoc. prof. Jiří Michal, dr. Stanislava Straňavská).