The impact of COVID-19 on social life has been drastic and global. However, the different
numbers of cases and different actions in different countries have been leading to various …

Reduced physical activity (PA) and prolonged screen time (ST) negatively influence health-
related quality of life (HRQoL), a protective factor against illness and mortality. Studies …

Background As children show a more complex but less structured movement behavior than
adults, assessment of their many spontaneous and impulsive movements is a challenge for …

Mental health (MH) and behavioral health are fundamental to a good quality of life. Only a
few studies have investigated the association between behavioral health (eg, physical …

Physical fitness is an important health resource. From 2003 onwards, the MoMo study, a part
of the German Health Interview and Examination Survey for Children and Adolescents …

Background & aims With high prevalence of overweight and obesity in developed countries,
the assessment of body composition in children and adolescents is of growing interest. The …

Second, to allow for better comparability with other research, the cycle ergometry test
protocol of the Physical Working Capacity 170 (PWC170) which assesses cardiorespiratory …

Background Outdoor play, sedentary behavior (SB), and moderate-to-vigorous physical
activity (MVPA) are related to youth's health, however, there are research gaps regarding 1) …

Introduction: Monitoring of physical fitness in youth is important because physical fitness is a
summative indicator of health. From a developmental and preventive perspective, physical …

Structured activities, in which children participate for example at school, are consistent and
limited in scope. After-school or weekend activities, by contrast, involve a wider range of …