Autism & Developmental

Effecting healthy lifestyle changes in overweight and obese young adults with intellectual disability.

Pett et al. (2013) · American journal on intellectual and developmental disabilities 2013
★ The Verdict

A 12-week gym-and-nutrition program gives small, short-lived weight and blood-pressure drops in obese young adults with ID.

✓ Read this if BCBAs serving overweight teens or adults with ID in day-hab or community gyms.
✗ Skip if Clinicians seeking long-term weight-loss protocols without booster plans.

01Research in Context

01

What this study did

Pett et al. (2013) ran a 12-week recreation-center program for overweight young adults with intellectual disability. The staff led group exercise, nutrition talks, and fun games three times a week.

Half the adults started right away. The other half waited. Researchers then checked weight, blood pressure, and balance.

02

What they found

The group that got the program first lost a little weight and lowered blood pressure right after the 12 weeks. Balance also improved.

Three months later, most gains had faded. The wait-list group caught up once they got the same classes.

03

How this fits with other research

Danon et al. (2025) kept the 12-week length but added cooking lessons and video calls. Their adults with ID kept strength gains longer, showing the program can grow.

Laposa et al. (2017) stretched the idea to older adults for eight months. They saw small gains in strength and thinking, proving the format works across ages.

Akhtar et al. (2022) hunted for weight-loss studies in kids with ID. They found only seven small papers, so Marjorie’s work is still one of the few real examples we have.

04

Why it matters

You can copy the cheap recreation-center model tomorrow. Pair simple exercises with short nutrition tips. Expect small, quick wins, not life-long change. To make gains stick, add booster sessions or teach cooking skills like Danon did. Either way, you now have a ready script when families ask for weight help.

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Schedule three 45-minute group sessions weekly: 20 min brisk walk, 15 min resistance bands, 10 min fruit tasting.

02At a glance

Intervention
other
Design
quasi experimental
Sample size
30
Population
intellectual disability
Finding
positive
Magnitude
small

03Original abstract

We evaluated a 12-week recreation center-based healthy lifestyle intervention for 30 obese home-dwelling young adults (YA) with intellectual disabilities. Three cohorts participated: YA only, YA and parents, and parents only. The YA cohorts received a nutrition/exercise intervention; parents focused on modeling healthy lifestyle behaviors. Outcomes included YA blood, nutrition, anthropometric, and fitness measures at pre, post, and 3-month follow-up. Compared with wait-list controls, the YA-only cohort improved immediately postintervention in blood pressure (BP), weight, and balance (p < .05). At 3-month follow-up, no intervention was consistently superior; overall reductions in weight, BP, hip circumference, and exercise barriers were obtained (p < .05). Linear and curvilinear changes from baseline to 3 months after the intervention varied by outcome and participant. Participants with Down syndrome lost less weight.

American journal on intellectual and developmental disabilities, 2013 · doi:10.1352/1944-7558-118.3.224