Physical activity patterns in children with and without Down syndrome.

Purpose: To describe physical activity (PA) patterns in children with Down syndrome (DS) compared to their unaffected siblings.

Methods: Children with DS (n = 28) and their siblings (n = 30), between 3-10-years (mean +/- SD 7.1 +/- 2.1 years) participated in a nutrition and growth study. PA was measured over 7 days using accelerometers.

Results: Children with DS were younger (6.6 vs. 7.1 years) and heavier (BMI 18.4 vs. 16.7 kg m(-2)) than their siblings (p < 0.05). Overall, participants accumulated 2.5 hours per day in moderate- (MPA) and 59 min per day in vigorous-intensity activity (VPA), consistent with the current PA recommendations for children. Children with DS accumulated less VPA than their siblings (49.5 vs. 68.6 minutes per day; p = 0.04) and for shorter bouts (2.5 vs. 5.1 minutes per bout; p < 0.01), but spent similar time in MPA and low-intensity PA. Analyses adjusted for age, sex, race, ethnicity, income, maternal education and BMI showed similar results.

Conclusions: Children with DS participated in less total and sustained VPA and had higher BMI levels compared with their siblings. Because children with DS have a tendency toward childhood obesity, increasing participation in VPA may be appropriate for prevention of obesity and promotion of lifelong health.