Abstract
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 <.01). Our regression model predicted 36.5% of the variance in step activity. Those who were still ambulatory after 2 years demonstrated baseline step activity nearly double that of those who were no longer walking 2 years later (P <.01). Discussion: Step activity for DMD is related to and predictive of functional declines, which may be useful for clinical trials.
Original language | English (US) |
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Pages (from-to) | 192-198 |
Number of pages | 7 |
Journal | Muscle and Nerve |
Volume | 63 |
Issue number | 2 |
DOIs | |
State | Published - Feb 2021 |
Keywords
- accelerometry, daily steps, Duchenne muscular dystrophy, functional ability, physical activity, walking
ASJC Scopus subject areas
- Physiology
- Clinical Neurology
- Cellular and Molecular Neuroscience
- Physiology (medical)