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 ...

This month we will be alternating between HIIT walks and a simple HIIT routine that uses just your bodyweight to get your heart rate up. On days when we’re doing walking workouts, you have three ...

Walking on an incline wins in this realm too, Miller says. “Walking on an incline is generally a lower-impact exercise ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." It seems like there’s always a new workout trend sweeping the internet. First it was the 12-3-30 ...

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 ...

I developed back issues after being a long-distance runner for ages, so I'm all about low-impact workouts nowadays. My every-other-day workout is walking three miles, fast, on a high incline on the ...