Athletes, how do you burn fat the quickest?

I have a decent body. Although I'm kinda skinny, I'm muscular without a shirt. I don't want to have a ripped body, I like to keep myself athletic and sexy while appearing skinny.

Over the years I've been pretty lazy, so I have a little pudge around my stomach that I'd like to burn off. Other than running, what are some ways to burn fat QUICK?

thanks.
Athletes, how do you burn fat the quickest?
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