Cardiorespiratory fitness (CRF) refers to the capacity of the circulatory and respiratory
systems to supply oxygen to skeletal muscle mitochondria for energy production needed …

Background Cardiorespiratory fitness (CRF) is an important indicator of current and future
health. While the impact of habitual physical activity on CRF is well established, the role of …

Objective This study sought to analyze the prospective association between vigorous-
intensity physical activity (VPA) and health-related outcomes in children and adolescents …

Purpose 1) To investigate the effectiveness of school-based high-intensity interval training
(HIIT) interventions in promoting health outcomes of children and adolescents compared …

Screen time is negatively associated with markers of health in western youth, but very little is
known about these relationships in Chinese youth. Middle-school and high-school students …

OBJECTIVES There is no clear guidance on the intensity and duration of physical activity
(PA) that adolescents require to maximise cardiorespiratory fitness (CRF). We aimed to …

Much evidence has indicated that adherence to the 24 h movement guidelines (physical
activity, screen time and sleep) is associated with physical health, while little is known about …

Introducción El cumplimiento de las recomendaciones en torno a la actividad física por parte
de los adolescentes es deficiente, a pesar de los demostrados beneficios sobre su salud …

Introduction Compliance with the recommendations regarding physical activity by
adolescents is poor despite its proven benefits on their health. Objective The objective of this …

Background The aims of the present umbrella review were (a) to summarize the available
evidence on the effectiveness of mobile applications aimed at increasing physical activity;(b) …