The 6 Best Curved Treadmills in 2023, According to Fitness Experts

Jan 25, 2024

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They can burn up to 30% more calories than a motorized treadmill.

IF YOU'RE an advanced runner, you're probably no stranger to pushing limits. But have you considered taking your training to the next level? If so, it might be time to add a curved treadmill to your training repertoire.

Imagine a cardio machine that challenges your physical limits and can also reduce your risk of injury. That's right—a curved treadmill offers a more natural gait that can result in shorter stride length. According to research, a decreased stride length results in less impact, meaning your joints will take less of a beating.

They're non-motorized and can be placed anywhere without requiring a power outlet, making curved treadmills an easy addition to virtually any home gym setup. You can walk, jog, or run on curved treadmills, just like you can on any standard machine. But because there's no motor, the user's movement powers the treadmill, resulting in up to 30% more calories burned compared to a motorized treadmill.

These machines offer a dynamic, advanced way to do sprint and interval training indoors. "The curved tread is ideal for anyone who wants to learn to build speed and acceleration without hitting the track," says our Fitness Director Ebenezer Samuel, C.S.C.S. "You’ll also get much better hamstring engagement on a curved tread than on a standard tread."

So if you're ready to take on a new challenge, it's time to give a curved treadmill a try. With a little practice, you’ll be running like a pro in no time. Here are our picks for the best curved treadmills of 2023.

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The HD Tread from Hammer Strength is built with a durable steel frame and a non-slip belt, making it suitable for even the most intense training sessions. It was originally built for commercial gyms, so you can trust it's made to last.

The treadmill has an adjustable resistance level which allows you to customize the intensity of the workout, making it ideal for experienced athletes in need of an extra challenge. It also comes with a built-in, easy to use console that displays key workout metrics such as speed, distance, and calories burned.

Read more: 8 Sprint Workouts

The TrueForm Runner is non-motorized, meaning the only thing powering it is you, and trust us, you’ll feel it. It features over 200 ABEC Bearings that the rubber track runs on to create a smooth, yet responsive feeling that is superior to standard treadmills. Although the TrueForm Runner is built to take a beating, it’s unique shape is actually incredibly well thought out. Rather than being flat, the curved design is there to help improve your running form by forcing you to go from heel striking to a mid-foot strike (which is a much better way to run.)

And because it’s powered by you, you’ll get better hamstring and glute engagement—and you’ll be able to reach speeds that many conventional treadmills can’t, if you’re so inclined. If you want to sprint or interval-train with true intensity on a treadmill, this is the way to go, even if there is a bit of a learning, err, curve to this one.

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The Assault Air Runner is a more budget-friendly version of the TrueForm curved tread, with a heavier belt that allows you to run faster. We find the TrueForm to better simulate road running, but many actually prefer the Assault Air Runner. Having been used in the CrossFit Games multiple times, the Assault Air Runner is non-motorized with a thick rubber belt that feels very comfortable in comparison to the ones often seen on traditional treadmills.

All in all, the Air Runner is one of the best values in the category currently available.

What do buyers say? "If you are seriously considering, stop waiting, and just buy it. I have had ... a couple of other treadmills, motorized of course, with screens and connected this or that, but nothing compares to this machine," said one Amazon reviewer.

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The SKILLMILL is a non-motorized treadmill similar to the Assault Air Runner and TrueForm Treadmill that are also on this list, but it’s more than that, too. Rather than just being made for running, the SKILLMILL utilizes “Multidrive Technology” that creates resistance on the free-spinning tread belt to turn the treadmill into a simulated sled push. Several companies have tried to duplicate this, but TechnoGym is absolutely producing the best version—it only takes a few minutes on the SKILLMILL to realize it’s unlike any other treadmill you’ve ever used.

You can go from walking to running to feeling like you’re pushing hundreds of pounds on a track. It’s incredibly versatile, great for home use where sled drags are difficult to perform, and is made to take a beating.

Read more: Sprint Interval Training Workout

If you're looking to level up your training with a curved treadmill at home but don't want to break the bank, this one from SB Fitness Equipment is worth considering.

It features three adjustable resistance levels for added challenge with no maximum speed, meaning it can grow with your fitness level. The CT400 immediately adjusts to speed changes, too, which makes it ideal for high-intensity sessions and sprinting.

The treadmill has a weight capacity of up to 350 pounds, so it's suitable for a range of body types.

Read more: Best Running Shoes

The IN10CT Health Runner is the only pick on this list with a maximum speed cap, but it allows for up to 50 MPH, so that should only be a limitation for the superhuman among us.

While it is heavy (weighing in at over 300 pounds), transport wheels and a rear handle make it easy to move. The compact design allows for storage in small spaces despite its considerable footprint.

Read more: Best Running Shoes for Wide Feet

It all depends on your personal fitness level and goals. So the answer is maybe.

Curved treadmills are non-motorized. They rely instead on you walking or running, and the belt being pushed backward manually with every foot strike on the sloped surface. While this might not seem as “fancy” or high-tech as a powered treadmill, this design has its benefits.

"Curved treadmills tend to recruit more muscles due to the shape of the belt and the act of propelling against it," says Eric Sung, C.S.C.S., a strength and conditioning coach based in Queens, NY. "It also eases the strain of your joints because of the curvature and is often better for users with varied joint pain."

By some reports, exercising on a curved treadmill burns 30% more calories over a traditional powered treadmill.

"One drawback of a curved treadmill is that it is difficult to achieve higher speeds (sprints) with proper technique. This can impact front side mechanics with one's stride through by 'reaching'," explains Sung.

Another thing to consider: because curved treads are motorless, they also don't allow for incline or decline capabilities.

Read more: Curved Treadmills

Curved treadmills are ideal for time-based workouts, where you know exactly how long you’ll be working for and can concentrate on putting in the effort.

Before you dive headfirst into training on a curved treadmill, it’s important to take things slow. Which starts with finding your feet. Measure out your early efforts before attempting harder workouts, as running on a curved belt requires different mechanics than a traditional treadmill. Toggle between accelerating and holding a steady pace to get a feel for both.

One of the key things to remember when training on a curved treadmill is that you’re in control. Although it may feel challenging at first, your brain will soon figure out the motion and then your body will fall into motion. You’ll need to position yourself closer to the front of the treadmill than might seem natural, allowing your foot to pull the belt back on landing. Maintain good posture, stay tall with your core engaged, and drive your arms to maintain momentum.

When shopping for a curved treadmill, there are several factors to consider. These include:

Size and space: Make sure you have enough space to accommodate a curved treadmill. Consider the dimensions of the machine and ensure that it fits comfortably in your workout space.

Price: Curved treadmills can be expensive, so determine your budget before starting your search. Keep in mind that while cheaper options are available, they may not offer the same quality and durability as higher-end models.

Weight capacity: Make sure the treadmill you choose can accommodate your weight and the weight of anyone else who will be using it.

Durability: Look for a machine with a sturdy construction and durable materials, as well as a good warranty, to ensure it will last.

Console and metrics: Consider the built-in console and what metrics it displays, such as speed, distance, calories burned, and heart rate. Look for a console that is easy to use and customizable to your fitness goals.

Brand reputation: Do some research on the brand of the curved treadmill you are interested in, and read reviews from other users to ensure that you are making a wise investment in a quality machine.

We consulted with Men's Health's fitness experts, editors and Director, Ebenezer Samuel, C.S.C.S., on the best curved treadmills on the market now. They evaluated several curved treads from top fitness brands to assess their performance, durability, and special features. We also considered top-rated picks and reviews on e-commerce websites we trust. The list above represents our curated selections for the best curved treadmills of 2023.

Talene Appleton is a fitness and food writer and editor, certified personal trainer (NASM-CPT), and former professional dancer based in New York City. Passionate about both exercise and cuisine, she merges her fitness, nutrition and culinary expertise with the goal of motivating others to embrace balanced healthy living. Her work has appeared in Men’s Health, General Surgery News, The Food Institute, The Nessie, and more.

Ebenezer Samuel, C.S.C.S., is the fitness director of Men's Health and a certified trainer with more than 10 years of training experience. He's logged training time with NFL athletes and track athletes and his current training regimen includes weight training, HIIT conditioning, and yoga. Before joining Men's Health in 2017, he served as a sports columnist and tech columnist for the New York Daily News.

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