Impact of fidget devices on anxiety and physiological responses in adults with ADHD.
A fidget ball did not ease stress or steady heart rate in adults with ADHD and even blocked their natural self-calming moves.
01Research in Context
What this study did
Researchers gave adults with ADHD a small fidget ball. They wanted to see if squeezing it during a stressful lab task would calm heart rate and lower anxiety.
Each person sat alone and did a timed math test. Half had the ball, half did not. The team tracked heart beats and tiny finger movements.
What they found
Heart rate, heart-rate variability, and anxiety scores looked the same in both groups. The ball did not help.
Oddly, people who usually fidgeted more had better heart-rate control—unless they got the ball. The toy broke that natural link.
How this fits with other research
Sung et al. (2022) pooled 34 studies and found real exercise boosts executive function in ADHD. A fidget ball is not exercise, so the null result makes sense.
Reiss et al. (1982) showed a five-minute jog cut self-stim behavior in autistic kids. Like the ball, it used movement, but jogging raised heart rate while the ball just occupied hands.
Jones et al. (2010) ran a year-long leisure program and saw stress drop in autistic adults. Their long, social sessions beat the single silent ball.
Why it matters
If you hoped a fidget toy would replace a movement break, this study says don’t count on it. Keep using brief exercise or social activity to help clients regulate. Save the ball for quiet hands only, not calm bodies.
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02At a glance
03Original abstract
BACKGROUND: Fidgeting devices are popular for managing ADHD, but their effectiveness remains unclear. This study investigated whether fidgeting modulates self-regulation in adults with ADHD during stress, exploring intrinsic versus extrinsic fidgeting with a fidget ball. We hypothesized that individuals with a fidget ball would demonstrate improved self-regulation under stress, reflected by higher heart rate variability (HRV) and lower anxiety levels. METHODS: Adults with ADHD were randomly assigned to a fidget ball (n = 49) or no fidget ball (n = 24) group. Physiological stress was measured via HRV and intrinsic fidgeting, that is, ankle and wrist movements, were measured via actigraphy. Physiological data were collected at baseline and during the Trier Social Stress Test (TSST). Self-rated anxiety was measured using the State Anxiety Inventory. RESULTS: Heart rate and fidgeting increased across TSST stages for both groups, with no significant differences in heart rate, HRV, or intrinsic fidgeting between groups. Notably, the fidget ball group had weaker correlations between fidgeting and HRV compared to the no fidget ball group. At baseline, the no fidget ball group showed a positive correlation between intrinsic fidgeting and HRV, suggesting an association between intrinsic fidgeting and self-regulation, however during stress the no fidget ball group showed a significant negative correlation between intrinsic fidgeting and HRV. The relationship between physiological measures and anxiety differed between groups and TSST stages. CONCLUSIONS: These results provide preliminary evidence that the fidget ball may disrupt the expected association between intrinsic fidgeting and HRV, emphasizing the need for further studies to explore its impact on self-regulation.
Research in developmental disabilities, 2025 · doi:10.1016/j.ridd.2025.104944