Reliability And Convergent Validity Of The Illinois Agility Test Among Chinese Children

PURPOSE: This study aimed to evaluate the test-retest reliability and validity of the Illinois Agility Test among Chinese children. METHODS: For test-retest reliability, 90 participants (41 males and 49 females; age: 11.6 ± 0.6 years; height: 148.3 ± 7.9 cm; weight: 43.1 ± 12.6 kg; BMI: 19.4 ± 4.6) completed the Illinois Tests twice, with a two-week interval between assessments. To assess the evidence of convergent validity, 189 participants (86 males and 103 females; age: 11.6 ± 0.5 years; height: 148.9 ± 7.7 cm; weight: 42.4 ± 11.3 kg; BMI: 18.9 ± 4.0) were evaluated using both agility tests alongside the 20-meter dash and the standing long jump (SLJ). Data were analyzed using Spearman correlation. Significance was set at p < 0.05. RESULTS: The intraclass correlation coefficient (ICC) for test-retest reliability of the Illinois Agility Test was 0.778. For convergent validity, the Spearman correlation coefficients between the 20-meter dash and the Illinois Tests were 0.540 (p < 0.001), and between the SLJ and the Illinois Tests were -0.611 (p < 0.001), respectively. CONCLUSIONS: The validity and reliability of Illinois Agility Test for Chinese children were moderately supported.