The 12-3-30 Workout: Everything You Need to Know & How to Try It at Home

By now, you've likely heard of the TikTok famous 12-3-30 workout. No running, no complicated programming — just a sweat-inducing climb on a treadmill tried by millions of people over the last few years.

Whether you're just starting your fitness journey or you're looking for a low-impact cardio challenge, this guide covers everything you need to know about the 12-3-30 workout: what it is, why it's effective, and how to try it at home.

What is the 12-3-30 Workout?

The 12-3-30 workout was created by influencer Lauren Giraldo, who shared it on YouTube and TikTok. It continues to be one of the most searched for workouts ever, and the format couldn't be simpler:

• Set your treadmill incline to 12%
• Set your speed to 3.0 mph
• Walk for 30 minutes

There's no running, no sprinting, and no intervals. It's a walking workout that challenges your cardiovascular system with the addition of a steady incline.

Benefits of the 12-3-30 Workout

There are many benefits to incline walking workouts, including the following:

• It challenges your cardiovascular system. At a 12% incline, your heart rate climbs quickly. Every 12-3-30 session will help to increase your cardiovascular endurance and improve your lung capacity: the same benefits you get from other more intense forms of cardio but with less strain on your body.
• It burns more calories than a standard walk. A 150 lb. person burns roughly 100 calories walking on flat ground for 30 minutes, but on a 12% incline, that same person can burn around 210 calories. The steep grade forces your body to work harder against gravity, turning up your metabolic rate without the need to run.
• It targets the lower body. Walking uphill outside shifts the demand onto your glutes, hamstrings, and calves. The 12-3-30 delivers that same experience but in a controlled environment indoors on the treadmill.
• It's low impact. Because this is a walking workout, the impact on your knees, hips, and ankles is significantly lower than running. Plus, you can incorporate this workout into your routine multiple times during the week while keeping risk of injury low.
• It's adaptable for every fitness level. The 12-3-30 workout is accessible for beginners, but it can also be dialed up for more advanced exercisers. As you adapt to incline training, increase the speed, incline, or total time on the treadmill to keep yourself feeling challenged.

The Best Treadmills for the 12-3-30 Workout

For incline workouts like 12-3-30, you'll want to choose a treadmill with a wide, comfortable deck, a smooth, quiet motor, and entertainment options to keep you engaged.

• Best for Getting Started: BowFlex T6 Treadmill. The BowFlex T6 packs in all the features you want at a price point you'll love. It's made for everyday walking and running enthusiasts who want a solid treadmill that can help them take their training to the next level.
• Best for the Ultimate Experience: BowFlex T16 Treadmill. The BowFlex T16 is built to keep you motivated and entertained while supporting serious training goals. With an extra-wide deck and an immersive HD touchscreen, you can watch your favorite shows or stream your favorite playlists in comfort.

Not sure which treadmill to choose? Check out our Treadmill Guide to learn more.

Getting Started with the 12-3-30 Workout at Home

If you're new to incline walking, jumping straight into a 30-minute session at a 12% incline may feel daunting. Here's a progression that gets you there more gradually in four weeks:

• Week 1: 6-8% incline, 2.5-3 mph speed for 15-20 minutes
• Week 2: 8-10% incline, 3 mph speed for 20-25 minutes
• Week 3: 10-12% incline, 3 mph speed for 25-30 minutes
• Week 4: 12% incline, 3 mph speed for 30 minutes

Consistency is key. Whether you try this workout or create your own, incline walking workouts on the treadmill are a great option to fit fitness into your routine at home.

FAQ: The 12-3-30 Workout

Is the 12-3-30 workout effective for weight loss?

Yes, the 12-3-30 can be an effective part of a weight loss plan. The incline significantly increases calorie burn compared to flat walking, and it's sustainable enough to do consistently. Like any workout, it works best when combined with a balanced diet and overall active lifestyle.

How many times a week should I do the 12-3-30?

Most people do the 12-3-30 three to five times a week. Beginners should start with two or three sessions and gradually increase frequency as their endurance builds. Give your legs at least one rest day between sessions, especially early on.

Does the 12-3-30 build muscle?

Incline walking activates and strengthens the glutes, hamstrings, calves, and core. That said, if building significant muscle mass is your goal, you'll want to pair the 12-3-30 with a strength training routine. BowFlex's adjustable dumbbells and home gyms pair perfectly with treadmill cardio days.

What treadmill incline is needed for the 12-3-30?

You need a treadmill that reaches at least 12% incline. All three BowFlex treadmills in the current lineup — the T6, T9, and T16 — reach 15% incline, which gives you more than enough room for the 12-3-30 and the ability to progress further if you choose.

Can I do the 12-3-30 every day?

You can, but it's not necessary. For beginners, daily sessions at 12% incline may lead to fatigue. Three to four times a week is a solid, sustainable cadence. Use other days for strength training, recovery walks, or stretching.

The content on this blog is for informational and entertainment purposes only and should not be considered medical advice. This information is not a substitute for professional medical diagnosis, treatment, or advice. Always consult with your physician or another qualified healthcare provider before beginning any new exercise program, making changes to your fitness routine, or if you have questions about your health.

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