Motor Competence and Health-related Fitness of School-Age Children: A Two-Year Latent Transition Analysis.

PURPOSE: The aims of this study were twofold: 1) to identify latent physical performance profiles of motor competence (MC) and cardiorespiratory (CF) and muscular fitness (MF) among school-age children and 2) explore transition probabilities in physical performance profiles over a 2-yr period. METHODS: The present sample comprised 1148 (583 girls, 565 boys) elementary school students (baseline Mage = 11.27 ± 0.32), and data were collected annually (equal intervals) over a period of 2 yr which resulted in a total of three measurements. The measures used were the throwing-catching combination test, 5-leaps and two-legged jumps from side-to-side test (MC), 20-meter shuttle run test (CF), and curl-up and push-up tests (MF). Latent transition analysis was used to identify and track physical performance profiles derived from the measurements of MC, CF, and MF scores. RESULTS: The key findings were: 1) three physical performance profiles were identified: (a) low (28% of the sample; lowest level in each category), (b) moderate (43% of the sample; higher MC, CF, and MF than low), (c) high (29% of the sample; highest MF); 2) the number of physical performance profiles and probability to belong to a given profile were stable across time; 3) the highest transition probability was found in the high group, where some students had transitioned to the moderate group at T2; and 4) girls were most likely to belong to the low group. CONCLUSIONS: Results demonstrated that children's physical performance profiles are stable from late childhood to early adolescence. This study suggests that the early elementary school years are essential for the development of children's MC and health-related fitness.