You can find dozens of new workouts on TikTok. From viral dances to push-up challenges, this video-sharing platform has never-ending fitness videos that are enjoyed by millions of users every day. Even many celebrities like Hilary Duff and Carrie Underwood are also participating actively in these workout videos. But recently a brand-new sweat session made the hype; the 12/3/30 workout challenge.

Social media star and actress Lauren Giraldo has created this workout challenge. It is a simple treadmill workout where participants have to promise major results. On the app, the video has been viewed by more than 70 million. The workout practice has revolutionized almost anyone’s fitness routine.

This workout has helped some users lose weight by burning calories in under an hour. Many TikTokers claimed that it is kickstarting their motivation to work. The challenge only has three “rules,” or steps. It is thought that the workout is getting popular due to its simplicity. Users are recommended to walk for 30 minutes on the treadmill at 3 miles per hour (MPH). They have to do the workout five days a week.

A certified personal trainer, Haley Gott, “It’s a great way to activate multiple muscle groups in your legs,” she adds, including your quads, your hamstrings, your glutes, and your calves.

She also said, “Everyone’s heart rates are different. So ultimately, if you’re trying to lose fat, then you should be paying attention to your heart rate zones.” Heart rate zones represent how fast your heart should beat during different kinds of exercise for the most efficient workout.”

Then Gott added, “Walking on a steep incline can aggravate your lower back. So, paying attention to your posture is important.” She also says it’s crucial to hold on to your core strength.”