The main purpose of the study was to evaluate the secular trends in physical fitness of
Chinese rural children and adolescents aged 7–18 from 1985 to 2019. The speed, muscular …

Background Physical fitness (PF) offers numerous physical and mental health benefits,
especially during childhood. Previous studies investigating trends in children's PF over the …

Introduction: The aim of this study was to evaluate the effects of a 16-week school-based
physical activity (PA) intervention on physical fitness (PF)(speed, hand-eye coordination …

This study aimed to evaluate developmental patterns in athletic performance during youth
and determine their association with changes in physical fitness. The testing included three …

Objectives The aim of the study was to briefly analyze the results of selected fitness tests of
Ukrainian adolescents against their Polish counterparts. Methods The study was school …

The aim of the study was to examine the direction of the secular changes in the waist and
hips circumferences, as well as selected associated body proportions, among children and …

Background: The COVID-19 pandemic, caused by the SARS-CoV-2 virus, has posed a
threat to society worldwide. The aim of the study was to analyze changes in the physical …

Objective The aim of this study was to assess temporal changes in physical fitness of
Chinese adolescents aged 13–18 years from 1985 to 2019. Methods Body size/composition …

Abstract In 1985, Thomas and French published results of a meta-analysis that examined
sex differences in grip strength in children 5 years of age and older. Their analysis included …

Objective: To evaluate the trends in physical fitness in children and adolescents. Method:
The present study focusses on a longitudinal analysis of the single two-legged jump (S2LJ) …