"I used to be so intimidated by the gym and it wasn't motivating," Giraldo explained in her TikTok video. "But now I go, I do this one thing and I can feel good about myself." She also claims the 12-3 ...

It seems like every other day there’s a new fitness craze taking social media by storm, promising to help us lose weight. Unfortunately, not all of these methods are safe and effective. One of the ...

I’ve always been pretty skeptical of viral TikTok workouts like the 12-3-30 workout. They can be created by anyone with an account, after all, so their merits aren’t usually backed by science. But the ...

The 12-3-30 workout has taken over TikTok, which is a testament to the algorithm and a few influencers’ abilities to game it. It’s really just treadmill walking, with specific parameters and overblown ...

A new workout trend is gaining in popularity, particularly among TikTok users. If you’ve seen the hashtag #12330 pop up on the video platform and wondered what it means, it refers to a new cardio ...

The expert-backed eating plan actually feels accessible—and has little downside.

There’s a reason everyone you know is doing the 12-3-30 workout. Invented in 2019 by content creator Lauren Giraldo, who went viral for claiming that simply walking uphill on a treadmill helped her ...