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The Most Useless Exercise Ever!

If you want to scream any time you see an ad for some ab exercise contraption that’ll “guarantee a flat stomach!”—we feel you. Does anyone still believe crunches help burn belly fat? (If so, they’re an idiot.)

Here’s more evidence: A recent study published in the Journal of Strength and Conditioning Research found that simply performing sit-ups, crunches, and other ab exercises won’t do much (correction: anything) to reduce belly fat.

One group of study subjects performed ab exercises 5 days a week while the control group did nothing. At the end of 6 weeks, there was no significant change in stomach fat in either group. Everyone was told not to change their diet.