SupplementsExercise

Daytime dysfunction predicts poorer cognitive flexibility only in children with ADHD who engage in low physical activity levels

In a cohort of 282 children with ADHD (mean age 8.59 years, 78.4% boys), approximately 60% had sleep problems. Children with sleep problems had longer sleep latency, poorer cognitive flexibility, and less moderate-to-vigorous physical activity (MVPA). The relationship between daytime dysfunction and cognitive flexibility was moderated by MVPA guideline attainment, such that daytime dysfunction predicted poorer cognitive flexibility only in children with low PA levels.

Last updated: Aug 26, 2026•0 RCTs•📖 Read as article →

Evidence Score

Evidence Score32/100
Human RCT☆☆☆☆☆
Meta-analysis☆☆☆☆☆
Mechanism★★★★★
Safety★★★★☆
Confidencelow

Study Evidence

Study 1. Executive Dysfunction in Children with ADHD and Sleep Problems: Does Physical Activity Matter?

observational

Liang X, Xu RH, Chen M, Su L, Tse AC, Liang Hsu C, Sun F, Li X, Chia-Hua K, Shum DHK, Li SX · Medicine and science in sports and exercise (2026)

Participants: N/A
Duration: 7 days of accelerometry
Intervention: Observational assessment of physical activity and sleep using accelerometry and PSQI; no intervention
Outcome: Executive functions (inhibitory control, working memory, cognitive flexibility), sleep parameters (PSQI, actigraphy-derived sleep latency, sleep efficiency, daytime dysfunction), MVPA
Effect Size: N/A
Population: Children with ADHD aged 6-12 years (mean 8.59 years, 78.4% boys)

Result:

PubMed: 42599061DOI: 10.1249/MSS.0000000000004107

Mechanism Graph

Children with ADHD have high rates of sleep problems and executive dysfunction
↓
Physical activity may be protective against sleep-related executive deficits
↓
Daytime dysfunction is associated with poorer cognitive flexibility
↓
This association is only significant in children with low MVPA, suggesting PA moderates the impact

Limitations

  • ⚠Cross-sectional design prevents causal inference
  • ⚠Self-reported sleep quality via PSQI may be subject to recall bias
  • ⚠Sample predominantly male, limiting generalizability to females
  • ⚠No control group of children without ADHD

Frequently Asked Questions

What percentage of children with ADHD had sleep problems in this study?▼

Approximately 60% of the children with ADHD exhibited sleep problems.

How was physical activity measured in this study?▼

Physical activity was objectively measured using the ActiGraph GT9X Link accelerometer over seven consecutive days.

What executive functions were assessed?▼

Core executive functions including inhibitory control, working memory, and cognitive flexibility were assessed using Inquisit Lab 5.

Does physical activity moderate the relationship between sleep problems and executive function?▼

Yes, the relationship between daytime dysfunction and cognitive flexibility was moderated by MVPA guideline attainment; daytime dysfunction predicted poorer cognitive flexibility only in children with low PA levels.

Products

Affiliate links coming soon. We only recommend products that match the doses and forms used in the cited research.

References

  1. 1.Liang X, Xu RH, Chen M, Su L, Tse AC, Liang Hsu C, Sun F, Li X, Chia-Hua K, Shum DHK, Li SX. "Executive Dysfunction in Children with ADHD and Sleep Problems: Does Physical Activity Matter?." Medicine and science in sports and exercise, 2026. PMID: 42599061 DOI: 10.1249/MSS.0000000000004107
Disclaimer: This content is for educational purposes only and is not medical advice. Evidence scores reflect the quality and quantity of available research, not clinical recommendations. Always consult a healthcare professional before starting any supplement or intervention.