Changes in objectively measured physical activity in adolescents with Down syndrome: the UP&DOWN longitudinal study

Area of Science:

• Exercise Science
• Developmental Psychology
• Genetics

Background:

• Understanding physical activity trends in adolescents with Down syndrome is crucial for developing effective interventions.
• Longitudinal studies are needed to track changes in physical activity over time in this population.

Purpose of the Study:

• To investigate 1- and 2-year changes in objectively measured physical activity in adolescents with Down syndrome.
• To identify factors influencing physical activity maintenance or decline in this demographic.

Main Methods:

• Included 99 adolescents with Down syndrome (aged 11-20 years) with accelerometer data at baseline and follow-up.
• Analyzed changes in physical activity levels over 1 and 2-year periods.

Main Results:

• Overall physical activity levels showed non-significant declines over 2 years (P > 0.05).
• Moderate-to-high physical activity tracking was observed (P < 0.001).
• Adolescents meeting guidelines at baseline had greater declines but remained more likely to meet them at follow-ups (P < 0.05).

Conclusions:

• Adolescents with Down syndrome exhibit stable physical activity levels over 2 years.
• Those initially meeting physical activity guidelines experienced more significant declines but maintained higher adherence rates.
• Findings highlight the need for tailored interventions to support sustained physical activity in this group.