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

Objective To estimate national and international temporal trends in handgrip strength for
children and adolescents, and to examine relationships between trends in handgrip strength …

Purpose This study aimed to review traditional and new perspectives in the interpretation of
the development of youth cardiorespiratory fitness (CRF). Methods We analyzed data from …

Background The cross-sectional associations between physical activity, physical fitness and
adiposity with risk factors for cardiometabolic disease (particularly novel ones such as …

Regular physical activity (PA) during childhood is associated with a range of positive health
outcomes and higher educational attainment. However, only 2.0% to 14.7% of girls and …

Background Low cardiorespiratory fitness (CRF) is associated with the development of
cardiovascular diseases during childhood, adolescence and older ages. The purpose of the …

Background Resistance training is now highly recommended for enhancing physical fitness
in preadolescence. According to this critical period of development, choosing the safe and …

Rigorously determined peak oxygen uptake is internationally recognized as the criterion
measure of youth cardiorespiratory fitness. The assessment and interpretation of children's …

Background Emerging evidence suggests that children's fatness increases and fitness
declines at a greater rate during the summer holiday period, compared with the school year …

The practice of physical activity during adolescence is essential for the proper development
of the population. In recent decades, the relevance of physical activity has been increasing …