Sleep and health-related physical fitness in children and adolescents: a systematic review.

Objectives: The aim of this systematic review was to summarize the evidence on the associations between the sleep duration or sleep quality and cardiorespiratory and muscular fitness in children and adolescents aged 6-19 years.

Material And Methods: This systematic review followed the Preferred Reporting Items for Systematic Reviews and Meta- analyses (PRISMA) and was registered with the international prospective register of systematic reviews PROSPERO network. Three databases (PubMed, SPORTDiscus and Science Direct) were searched until October 2019 for scientific articles concerning sleep duration, sleep quality and physical fitness.

C-reactive protein, physical activity and cardiorespiratory fitness in Portuguese adolescents: a cross-sectional study.

The goal of this study was to investigate the association of physical activity (PA) and cardiorespiratory fitness with C-reactive protein (CRP) concentration in adolescents. The sample included 386 Portuguese adolescents (n = 207, female), age 12-18 years, assessed in the year 2012. The PA was assessed with the use of accelerometers, and the cardiorespiratory fitness was assessed by the Fitnessgram Pacer test.

Objectively measured physical activity and body mass index in preschool children.

Aim. To examine the association between objectively measured physical activity (PA) and body mass index (BMI) in preschool children. Methods.