The "Bent knee push-up" and the "Timed dipping" are two upper-body strength assessment tests whose simplicity and ease of use make them suitable to be applied to pre-school children. Nevertheless, their psychometric properties have not been properly studied for this age group. This study aimed to fill this gap. To accomplish this, both tests were administered three times (familiarization, test and retest) to a group of 120 children (mean age 48.60+/-9.94 months; BMI 17.05+/-2.04 kg/m2; 50% girls), with a week interval between each assessment. The obtained results in each test were compared with those obtained in the "Hand-held dynamometry" (the criterion measure) with the aim of identifying their construct validity. The reliability of the tests was analyzed by comparing the obtained results during the second (test) and the third (retest) time that each one was carried out. Intraclass correlation coefficients (ICCs) were used to examine reliability, and Pearson correlation coefficients were used to examine validity. The "Bent knee push up", showed a moderate reliability for 3 year old children (ICC: .690; 95% CI: .379-.845) and high for those aged 4 (ICC: .848; 95% CI: .715-.919) and 5 (ICC: .702; 95% CI: .441-.841). Similar results were obtained for the "Timed dipping", in children aged 3 (ICC: .522; 95% CI: .422-.761), 4 (ICC: .766; 95% CI: .560-.875) and 5 (ICC: .828; 95% CI: .677-.908). Both tests showed a good construct validity, with the exception of the "Timed dipping" in 3 year old children (r=.200; p=.256). The results in this study suggest that the "Bent knee push up" and the "Timed dipping" show psychometric properties that make them suitable to be employed in research carried out with preschoolers.
Copyright (C) 2014 by the National Strength & Conditioning Association.