Most TikTok fitness trends aren't worth your while. Let's break down what you need to know outside social media's echo ...

The 4-2-1 workout trend is all over TikTok. As 4-2-1 is less a workout and more a vague set of rules, I can’t give it an overall “good” or “bad” grade, but I can rate some of the ...

That’s why the 4-2-1 workout method, popularized by personal trainers like Dr. Robin Barrett on fitness app Ladder, has stuck around for years. Quite simply, it works.