In an ambulatory child with obesity, how is mobility most impacted?

In an ambulatory child with obesity, how is mobility most impacted?

• A. Greater energy expenditure
• B. Lower energy expenditure
• C. No change in energy requirements
• D. Increased speed with less effort

Answer: (A)

Moving more body mass requires more work. In children with obesity who are ambulatory, every step to move that extra weight costs more energy—they end up using more oxygen and calories per meter walked, even at the same speed. That higher energy cost translates to quicker fatigue and reduced endurance, limiting how far or how long they can move before tiring. So mobility is most impacted by greater energy expenditure rather than being easier, unchanged, or faster with less effort.

Moving more body mass requires more work. In children with obesity who are ambulatory, every step to move that extra weight costs more energy—they end up using more oxygen and calories per meter walked, even at the same speed. That higher energy cost translates to quicker fatigue and reduced endurance, limiting how far or how long they can move before tiring. So mobility is most impacted by greater energy expenditure rather than being easier, unchanged, or faster with less effort.