If food/stored fat are the body’s source of energy, why are overweight people typically more sluggish?

Question

If food/stored fat are the body’s source of energy, why are overweight people typically more sluggish?

In: 2

Answer 1

Its not a quick source of energy. It’s a long term source that can be used during periods of deprivation. Meanwhile having it and in far more abundance than one would have ever had in a hunter/gatherer lifestyle produces it’s own issues including mobility.