Add Yahoo as a preferred source to see more of our stories on Google. "Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." NOT SURE WHAT to do at the gym?

What is the 12-3-30 fitness routine? "The most goated cardio formula" @brazaussie dubbed the 12-3-30, “the most goated cardio formula,” in a post from June 9 that has 563 thousand views. “Whoever came ...

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 ...

When you walk into a gym in the new year and spot a person walking steadily on the treadmill at a very high incline, they could be following a viral workout trend. The "12-3-30" workout, the ...

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 low-impact 12-3-30 treadmill workout has taken social media by storm and made its way into gyms, homes, and the hearts of gym-goers worldwide. Devotees claim the workout has helped them shed ...

Theresa Marko, PT, DPT, MS, OCS, is a board-certified orthopedist with over 20 years of experience. Sarah is a writer, researcher and avid yoga practitioner with a decade of experience covering health ...

I’ve always been pretty sceptical 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 is one of the biggest fitness trends of the past few years. This TikTok-viral treadmill routine has become the go-to way to sweat for millions of folks — including Hilary Duff.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." NOT SURE WHAT to do at the gym? Take a scroll through TikTok or Instagram. It probably won’t be long ...