Sufficient sleep duration in autistic children and the role of physical activity.
Stacey D Elkhatib Smidt, Nalaka Gooneratne, Edward S Brodkin and 2 others
PMID 34991371WHAT IT FOUND
More physical activity linked to better sleep in autistic kids, but the benefit weakened as severity rose.
The link held for mild autism but disappeared in severe autism, intellectual disability, girls, and younger children.
Key findings
01Higher physical activity was associated with increased odds of sufficient sleep duration in the full sample, with the benefit plateauing at 4-6 days of activity per week.
02The positive association between physical activity and sufficient sleep was significantly weaker or absent in specific subgroups: those with severe autism, autism with intellectual disability, females, and children aged 6-12.
03Overall, there was no statistically significant interaction showing the association differed between autistic and nonautistic children generally, though estimates were less pronounced for autistic children.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The study is cross-sectional, so it cannot prove that physical activity causes better sleep. Data relied on caregiver recall rather than objective measures like actigraphy for sleep and activity. The sample was predominantly white, limiting generalizability. Sleep duration was only measured for school nights, not weekends. Residual confounding from unmeasured factors cannot be ruled out.
Declared interests
The authors declared no conflicts of interest.
The easy way to misread this
Do not conclude that physical activity is ineffective for sleep in all autistic children. The lack of association was specific to subgroups with severe autism, intellectual disability, female sex, or younger age. For children with mild autism, the link between activity and sleep remained positive.