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A fitness trend that took TikTok by storm, racking up more than 14 million views, may have some science behind it.

The 12-3-30 treadmill workout, popularized by influencer Lauren Giraldo, promises a fat-burning, low-impact fitness solution: Walk at a 12% incline, at a pace of three miles per hour, for 30 minutes.

But how does it compare to regular running?

FORGET 10,000 STEPS — RESEARCH REVEALS THE REAL NUMBER YOU NEED FOR BETTER HEALTH

A new peer-reviewed study published in the International Journal of Exercise Science compares the 12-3-30 trend to "self-paced" treadmill running .

Researchers sought to determine not just how many calories each method burns, but how the body fuels each workout — specifically, whether

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