Walking activity in a large cohort of boys with Duchenne muscular dystrophy

Introduction In this study we explored walking activity in a large cohort of boys with Duchenne muscular dystrophy (DMD). Methods Step activity (monitored for 7 days), functional ability, and strength were quantified in ambulatory boys (5‐12.9 years of age) with DMD and unaffected boys. Ambulatory status was determined 2 years later. Results Two to 5 days of activity monitoring predicted weekly step activity (adjusted R2 = 0.80‐0.95). Age comparisons revealed significant declines for step activity with increasing age, and relationships were found between step activity with both function and strength (P