The purpose of this study was to examine age and sex differences in standing long jump (SLJ) and to determine norm-referenced values for Spanish preschool children.
A total of 3555 children, aged 3–6 years, participated in this study (1746 girls and 1809 boys). To measure explosive leg power, the SLJ was used.
In the analysis of reliability using test-retest with 86 children (48% boys, age = 56.22 ± 10.34 months), the following descriptive results were obtained (mean, SD): at pretest = 76.53 ± 20.20 cm, at retest = 74.56 ± 21.12 cm (p = .124), and an intraclass correlation coefficient = 0.913 (95% confidence interval = 0.866–0.943). Boys exhibited a greater performance than girls at 3- to 5-years old, but no significant differences were found at 6 years old. In whole group, the SLJ performance was higher with increased age. However, no significant differences were found between boys aged 5 and 6 years.
This study provides references values for muscle strength assessment through SLJ test carried out on a large sample of Spanish preschoolers.