2025, Vol. 14, No. 2, pp.135-140
ISSN(Print):1857-8152; ISSN(Online):1857-8160
Abstract
Test-retest reliability of the Standing long jump test has been conducted in 40 adolescents aged 13-14 years old .The participants were in good psychophysical health and regularly attended physical education classes. The test included performance of two trials and the best result was recorded for analysis The results showed a high level of test reliability, with an interclass coefficient (ICC) of 0.985, which exceeds the threshold for excellent reliability. (0.9) . The Standard measurement error (SEM) was 1.82 cm, whereas the smallest detectable difference(SDD) was 5.05 cm, which indicates high measurement precision. The paired t-test showed that there were not significant differences between the first and the second measurement, which additionally confirms the consistency of the results.. Bland-Altman analysis revealed minimal systematic differences between the measurements, with a random distribution of points around the mean line, implying a high degree of methodological agreement. The standing long jump test has proved to be a reliable and applicable tool for assessing explosive lower-limb strength. The results support findings from previous studies highlighting the practicality of the test for evaluating physical abilities in adolescents.
The results provide test standardization in local and international frames. Additional research involving larger sample sizes and diverse contexts is recommended for broader validity.
Key words: test-retest , explosive strength, adolescents, fitness, field tests
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