The stress of "calorie"?

[sitifan]

At 0:53 of the video below, "calorie restriction" is pronounced as "caLORie reSTRICtion."

Why does the stress of "calorie" fall on the second syllable?

 

[emsr2d2]

He doesn't say "calorie restriction". He says "caloric restriction". It's an adjective and he puts the stress in the right place.