The Effects of a 16-Week School-Based Exercise Program on Anxiety in Children with Autism Spectrum Disorder.

Physical activity interventions have been shown to decrease anxiety in children with ASD. There is little known regarding the effects of an exercise program on anxiety in both home and school settings and the optimal dosage to reduce anxiety. Therefore, the aim of this study was to assess the effects of a 16-week exercise program on the anxiety levels of children with moderate to severe symptoms of ASD in home and school settings, and to compare the effects at 8 and 16 weeks. This study was a within-subject, non-controlled design, intervention study. Twenty-four children (5−18 years) with moderate to severe ASD were included. A school-based exercise program was implemented three days a week for 16 weeks. Parents and teachers completed the Anxiety Scale for Children for ASD (ASC-ASD) at baseline, week 8, and week 16. A one-way repeated-measure ANOVA with post hoc analysis using Bonferroni adjustment was used to test for a significant effect for time (p < 0.05), with Cohen's d used to calculate the effect size. For teacher-reported anxiety, there were significant decreases from baseline to week 16 for total ASC-ASD (p < 0.001), performance anxiety (p < 0.001), anxious arousal (p < 0.001), and uncertainty (p < 0.001). There was no significant decrease in parent-reported anxiety. The findings demonstrate that a 16-week exercise program can reduce anxiety in children with ASD in school settings. Results demonstrate that 16 weeks, as opposed to 8, may be necessary to have a significant effect on in-school anxiety.

Comparison of fitness levels between elementary school children with autism spectrum disorder and age-matched neurotypically developing children.

Low physical fitness is associated with reduced physical activity and increased cardiovascular diseases. To date, limited research has compared physical fitness levels between children with and without autism spectrum disorder (ASD). Therefore, the primary aim was to investigate if differences in fitness levels exist between children with ASD and age-matched neurotypically developing children (ND). The second aim was to examine if age, sex, height and weight could be used to predict potential fitness levels. The third aim was to examine if the developmental trajectory of fitness is comparable between children with ASD and ND children. The modified Eurofit test battery was used to compare fitness levels between 244 children aged 4-13 years old (n = 152 ND and n = 92 ASD). Independent samples t tests and regression analyses were used to investigate differences in fitness levels between the two groups. The results indicated that statistically significant differences exist in fitness levels between children with ASD when compared to ND children across all ages, favoring the ND children, with small to large effect sizes noted (p < 0.05, d = 0.36-1.13). Regression analysis could not accurately predict fitness measurements in children with ASD but could for ND children. The developmental trajectories were significantly delayed on the 20 m sprint and standing broad jump for children with ASD when compared to ND children. Future studies should seek to address the disparities in physical fitness experienced by children with ASD by using relevant neuromuscular interventions.