You cannot spot target weight loss. It will decrease as a total over your whole body rather than in a particular area. And don't believe anyone who tells you otherwise.
If you want to lose weight in the most efficient way possible, just sit. Or rather, SIT.
Unless you’re panting because you’re scarfing down food so fast you need to catch your breath, then yes.
Weight loss can pretty much always be simplified to calories in, calories out. All the different fads, trends, diets, and fasting are all just different means to either reduce your calories in, or increase your calories out.
Anything that makes you pant is more calories out.