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From Men's Health

The 12-3-30 workout has been popping up all over fitness TikTok. The workout, originally created by Lauren Giraldo, actually showed up on her YouTube channel back in 2019 when she was looking for a simple and approachable way to get fit.

'I was out of shape and didn't have a great relationship with fitness at the time,' Giraldo told Runner's World. 'I found a lot of the fitness advice and workouts online were extremely overwhelming and impossible to stick with long term.'

So she decided to come up with her own workout. At the gym, Giraldo found weights intimidating and gravitated toward the treadmill instead. And through trial and error, the 12-3-30 workout was born. It has since made its way through TikTok and is taking the treadmill trends world by storm.

But is this workout legit and can it benefit you as a runner? We asked Jess Mena D.P.T., certified strength and conditioning specialist, and Brianna Bernard, Isopure athlete and certified personal trainer to help us break it down.

What Is The 12-3-30 Workout?

The 12-3-30 workout is pretty straightforward: You set a treadmill to a 12 per cent incline and 3.0 speed and walk for 30 minutes.

'I found 12 incline, 3 speed, for 30 minutes on a treadmill was easy enough for me to do frequently but still challenging enough for me to feel accomplished after,' Giraldo said. 'It was what got me in the gym every day and set the foundation for my fitness and health journey.'

Setting the tread to a 12-percent incline forces your body to work a lot harder in order to push your own body weight up an incline, says Mena. The 3.0 speed is an average walking speed and attainable for most folks so this makes it a very beginner-friendly option.

Giraldo, who said she has never been a runner, loves the 12-3-30 workout because it's a way for her to use a treadmill and feel like she's getting more out of it than just walking.

Who Should Do The 12-3-30 Workout?

If you are looking to start exercising, this is a great workout for beginners. You can even start at a lower incline or slower speed. Since walking on an incline builds strength in your glutes and hamstrings, it can serve as a stepping stone for strength training.

But anyone who wants to get in a solid cardio workout—experienced and novice runners alike—can do this workout, says Bernard. For runners who dread the tread—the incline produces an increased heart rate, as well as greater posterior chain activation (think: glutes, quads, and hamstrings) as opposed to walking on a flat road, says Bernard. For experienced runners, this workout is a great option for a recovery or cross-training day.

What Are The Benefits of the Workout?

Giraldo still uses the 12-3-30 for cardio, and says over time, it gave her the confidence to try new things in the gym, so it can be helpful for building both cardiovascular strength and confidence. Now, she incorporates weights after cardio some days.

Walking on an incline on a treadmill means you don't have to drive somewhere to find hills, and if you have a tread in your home, it's a great way to get a workout in without going to the gym (an especially great option during the COVID-19 pandemic).

Mena says the workout can be used as a way to increase stamina and endurance for long-distance runners. 'It's a nice way to force other muscles to work a little harder and in a different way,' Mena says.

If you typically run on a flat road, this workout can be a great way to prepare for the hills you might find on a race course. The incline helps build endurance that will help you get through those final, sometimes gruelling miles in a race or intense workout, says Bernard.

Plus, it's great for those who work a desk job. When you're short on time, Bernard also suggests breaking the workout into three 10-minute walks. Studies have shown that training for 30 minutes at the end of an eight-hour workday isn't enough to counteract all of the sitting we do. 'Therefore, we need to increase our movement throughout the day and the 12-3-30 is an easy fix for that,' Bernard says.

How Often Should You Do the Workout?

Giraldo tries to do the workout every day. 'It's become less of a workout and more of a lifestyle,' Giraldo says. I use it as my 'me time.' I put on a YouTube video or my favourite Netflix show and tune out the world. Even after three years, I still feel just as accomplished when I do it now than when I started.'

For a novice, it's best to ease into it by doing the workout just two times a week. Each week, add one day until you reach five-plus days, checking in with your body to see how it's adjusting to the workout to avoid injury, says Mena.

Over time, your body will adapt to this workout, so if you want to see change—increase your cardio, build strength, or even lose weight—you'll eventually have to add a new stimulus like weight training or running to affect greater change.

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