Developmental coordination disorder (DCD) is often comorbid with attention-deficit/hyperactivity disorder (ADHD). While children with DCD engage in less moderate-to-vigorous physical activity (MVPA) compared to typically developing (TD) children, research pertaining to how ADHD affects this relationship is limited. We investigated the effect of ADHD on MVPA among children at risk for DCD (DCDr). 507 children aged 4–5 years (DCDr = 233, TD = 274) participated. Motor skills were assessed using the Movement Assessment Battery for Children-2nd edition (DCDr; ≤ 16th percentile), ADHD symptoms were assessed using the Child Behaviour Checklist, and Actigraph accelerometers measured MVPA over seven days. DCD did not negatively affect MVPA, however, after adjusting for ADHD symptoms, the effect of DCD became significant and was driven by symptoms of inattention. Symptoms of ADHD may be suppressing the negative effects of DCD on MVPA, highlighting the importance of assessing and controlling for ADHD symptoms in this population.

发育协调障碍（DCD）通常与注意力缺乏/多动症（ADHD）并存。与通常发育的（TD）儿童相比，DCD的儿童进行的中度至剧烈的体育活动（MVPA）较少，但是关于ADHD如何影响这种关系的研究仍然有限。我们调查了多动症对有DCD风险的儿童（DCDr）的MVPA的影响。507位4-5岁的儿童参加了比赛（DCDr = 233，TD = 274）。使用儿童运动评估电池第2版（DCDr；≤16％）评估运动技能，使用儿童行为清单评估ADHD症状，并用Actigraph加速度计在7天内测量MVPA。DCD不会对MVPA产生负面影响，但是，在调整了ADHD症状后，DCD的影响变得显着，并由注意力不集中的症状驱动。ADHD的症状可能正在抑制DCD对MVPA的负面影响，突显了评估和控制该人群中ADHD症状的重要性。