Acute effects of exercise on gaze fixation and affective response inhibition in children with autism spectrum disorder: A randomized cross-over study.
A single 20-minute bike ride right before social tasks slightly worsens emotion reading and eye gaze in kids with ASD.
01Research in Context
What this study did
Kids with autism pedaled a stationary bike for 20 minutes at a steady, moderate pace. Right after the ride they looked at pictures of emotional faces while a camera tracked their eye movements.
Each child also did a quiet reading session on a different day for comparison. The order of bike day and reading day was flipped for half the kids.
Researchers then scored how well the kids named the emotions and how long they looked at the eyes and mouth.
What they found
The short bike ride slightly lowered emotion-naming accuracy. It also cut the time kids spent looking at the eye region.
In plain words, a quick spin tired the social brain instead of waking it up.
How this fits with other research
This result clashes with longer exercise programs. Zhao et al. (2024) ran 12 weeks of pool workouts and saw better inhibition control and sharper eye gaze in the same population. The difference is time: one bout versus months of practice.
Two big reviews still back exercise. Neuhaus et al. (2016) found horseback riding and martial arts gave "moderate-to-large" gains in social and attention skills. Wong et al. (2023) show that even short bouts before lessons can cut stereotypy.
So the field agrees exercise helps—just not right before a face-reading task. The negative swing seen here likely fades within an hour, while the long-term benefits build over weeks.
Why it matters
If you run social-skills groups, do not open with a cardio warm-up. Save the movement break for after the lesson, or use calm stretching instead. Keep the long-term exercise plan—just separate it from immediate social work.
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02At a glance
03Original abstract
Children with autism spectrum disorder (ASD) show impairments in response inhibition, especially in socio-emotional contexts. A single aerobic exercise session has the potential to temporarily reduce such impairments as findings from neurotypical children support acute benefits of this exercise type for inhibitory control and emotion recognition. In children with ASD, we therefore aimed to investigate the effects of an aerobic exercise bout on response inhibition in an emotional Go/NoGo task and gaze fixation as possible mechanism underlying changes in performance. Using a cross-over design, 29 patients completed a 20-min aerobic exercise bout at moderate intensity on a cycling ergometer and a control condition in a randomized order. An emotional Go/NoGo task was administered before and after both experimental conditions. Eye-tracking was performed during the cognitive task to assess the duration of gaze fixation of eyes and mouth parts of faces expressing happy or sad emotions. The results support no beneficial effect of exercise on performance on the emotional Go/NoGo task. Instead, patients showed a greater decrease in accuracy on Go trials displaying happy faces in the exercise compared to the control condition. This change was associated with a more pronounced decrease in the fixation duration of the eyes for faces expressing either happy or sad emotions. In conclusion, while a single session of moderately intense aerobic exercise does not affect response inhibition, it temporarily aggravates ASD-specific deficits in the processing of and response to facial emotions.
Autism research : official journal of the International Society for Autism Research, 2024 · doi:10.1002/aur.3224