Motor coordination as predictor of physical fitness in prepubertal boys

Abstract Motor competence is associated with numerous health-related variables of the pediatric population. The present study aimed to analyze the effect of the level of motor coordination on performance in several physical fitness tests in prepubertal boys, before and after controlling body mass. The sample consisted of 71 Brazilian eight-year-old boys. Anthropometry included stature, body mass and estimates of fat mass and fat-free mass. Biological maturation was evaluated by the percentage of predicted adult stature. The physical tests applied were 2-kg medicineball throw, handgrip strength, sit-ups in 60 seconds, standing long jump, 10x5-m shuttle run, 20-m shuttle run and sit and reach. Motor coordination was assessed by the Körperkoordinationtest für Kinder (KTK). For data analysis, descriptive statistics, Pearson correlation, Student’s t-test and ANCOVA were used, with body mass as covariate. Significance level was set at p <0.05. There was no difference in maturational level between the different groups of coordinative performance. The results showed that boys with better performance in motor coordination tests are associated with better results in physical fitness tests, especially those involving body mass displacement. This trend remained even when comparing groups controlling body mass, except for the sit-up test. Therefore, it could be concluded that motor coordination is a predictor of physical fitness in prepubertal boys.