Dose–Response Relationship: The Effect of Motor Skill Intervention Duration on Motor Performance

in Journal of Motor Learning and Development

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Leah E. RobinsonUniversity of Michigan–Ann Arbor

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Kara K. PalmerUniversity of Michigan–Ann Arbor

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Sean K. MeehanUniversity of Michigan–Ann Arbor

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Background:

This study examined the effects of three different treatment doses of a motor skill intervention (the Children’s Health Activity Motor Program [CHAMP]) on changes in preschoolers’ motor performance.

Methods:

Onehundred and nine children were divided into one of four groups: control and three CHAMP dosage groups: T1, 660 min; T2, 720 min; or T3, 900 min. Motor performance was assessed before and after the intervention using the Test of Gross Motor Development, 2nd Edition (TGMD-2). We used a 2 (time) × 4 (treatment) mixed-measures ANOVA to determine interaction and main effects. Significant interactions were decomposed using separate one-way between groups ANOVAs at each time point followed by Tukey’s post hoc tests.

Results:

Results revealed a significant time × treatment interaction (F3, 100 = 16.79; p < .001). There were no differences across treatment groups before the intervention (F3, 100 = .075, p < .90), but after the intervention the control group had significantly lower TMGD-2 scores compared with all three CHAMP intervention groups (F3, 100 = 9.92, p < .001, all post hoc tests, p < .001). Posttreatment differences can be attributed to greater improvements in motor performance following the CHAMP intervention regardless of specific dosage.

Conclusions:

Motor performance scores for all children who completed CHAMP significantly improved.

Robinson and Palmer are with the Child, Movement, Activity and Developmental Health Laboratory, School of Kinesiology, University of Michigan, Ann Arbor, MI. Meehan is with the Human Sensorimotor Laboratory, School of Kinesiology, University of Michigan, Ann Arbor, MI.

Please address author correspondence to Leah Robinson at lerobin@umich.edu.
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