'excess calories' is correct and can be used in written English.
For example, "Eating too much can lead to an accumulation of excess calories."
These behaviors include anything that encourages a more sedentary lifestyle (such as playing video games excessively) and eating excess calories (such as a high-sugar, high-fat diet).
Nor do we have a tax on excess calories.
Limit intake of high fat foods, excess calories, alcohol etc to maintain said healthy liver.
By midday we had made over a dozen runs and burned the excess calories.
Manual labor took care of excess calories, if not hardened arteries.
You can burn off excess calories by swimming or playing tennis.
The real enemy is the number of excess calories available for consumption, regardless of the source.
They provide no nutritional value and are today's biggest contributors to excess calories.
The excess calories are then stored as fat, or adipose tissue.
When it's on, in the few hours after eating, you burn carbohydrates for energy and store excess calories as fat.
The inference being that consumers are as guilty for not burning off excess calories as companies are for providing them.
