The phrase "burning capacity" refers to the amount of energy or power that something has to burn, typically in the context of fuels or combustion. It describes how much of a material can be burned and release energy. Full definition
Once I get closer to competition I will add supplements to improve my energy levels and fat burning capacity during work - outs. (cenvall.com)
Strange as it may sound, we quite literally change our calorie burning capacity when we're stressed. (psychologyofeating.com)
This means that fish oil is able to only prevent the accumulation of excess body fat, but increase the body's fat - burning capacity regarding the previously stored fat as well. (fitnessandpower.com)