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Validity and Reliability of the Medicine Ball Throw for Kindergarten Children

Davis, Kathryn L1; Kang, Minsoo2; Boswell, Boni B1; DuBose, Katrina D1; Altman, Stacey R1; Binkley, Helen M2

Journal of Strength & Conditioning Research: November 2008 - Volume 22 - Issue 6 - pp 1958-1963
doi: 10.1519/JSC.0b013e3181821b20
Original Research

Davis, KL, Kang, M, Boswell, BB, DuBose, KD, Altman, SR, and Binkley, HM. Validity and reliability of the medicine ball throw for kindergarten children. J Strength Cond Res 22(6): 1958-1963, 2008-The purpose of this study was to establish validity and reliability evidence for the medicine ball throw test for kindergarten students, an underrepresented group in the literature. The subjects were 105 students, 5-7 years old, BMI 17.44 ± 3.17 kg·m−2, 43% female and 57% male. Intraclass correlation coefficients (ICCs) were used to examine reliability, and Pearson correlation coefficients and a paired t-test were used to examine validity. To accomplish this, the kindergarten students completed the medicine ball throw test on two different days and the modified pull-up test, the “criterion” measure, on another day. For the medicine ball throw, each student sat on the floor before throwing the medicine ball forward like a chest pass three times. The medicine ball throw was highly reliable both within 1 day (ICCs = 0.93 and 0.94 for day 1 and day 2, respectively) and across 2 days (ICC = 0.88), with all reliability estimates over the acceptable level of 0.80. The medicine ball throw scores were positively related with height (r = 0.34) and weight (r = 0.34), and there was a significant difference between the 5-year-old group (mean ± SD; 111.78 ± 34.93) and the 6-year-old group (135.60 ± 39.77), t = −3.23, p = 0.002, which supports correlational and known-difference evidence of validity for the medicine ball throw test. Even though no correlation was found between the medicine ball throw test and the modified pull-up test, r = −0.04, other forms of validity evidence (i.e., known-difference and correlational) were apparent. In conclusion, the medicine ball throw test seems to be a valid and reliable measure of upper-body strength for kindergarten children.

1Department of Exercise and Sport Science, East Carolina University, Greenville, North Carolina; and 2Department of Health and Human Performance, Middle Tennessee State University, Murfreesboro, Tennessee

Address correspondence to Kathryn L. Davis, daviska@ecu.edu.

© 2008 National Strength and Conditioning Association