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NordicTrack - X24 Treadmill with 40% Incline for Strength and Cardiovascular Health - Black

Model: NTL39225
SKU: 12245762
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About this product

About the X24 Treadmill:Condition for the climb ahead with the X24 Incline Treadmill. With a 40% incline to -6% decline range, this treadmill replicates challenging hills and varied terrain for immersive, full-body training. Its unique design engages glutes and hips with a natural, hip-driven ground reaction force, bringing outdoor adventure indoors. The 24” HD touchscreen pivots for optimal viewing, whether you’re running or following off-treadmill workouts. A speed range of 0-12 MPH allows you to run up to a 5-minute-mile pace. The SpringFlex cushioned deck absorbs impact, supports dynamic movement like hiking, running, walking backwards, lateral shuffles, and even skipping, turning the X24 into a full-body, multi-directional training platform. While you work out, the built-in AutoBreeze™ fan keeps you cool and adjusts based on the intensity of your workout. A USB-C port ensures your devices stay charged during workouts. About iFIT:iFIT offers over 10,000 workouts led by professional athletes and fitness experts. With the iFIT Pro Membership*, you can access a wide range of training programs, including strength, yoga, HIIT, and more. iFIT's SmartAdjust technology personalizes each workout to your fitness level. With a compatible heart rate monitor (sold separately), ActivePulse adjusts workout intensity based on your heart rate, ensuring optimal training. The iFIT platform also integrates with popular fitness apps like Strava, Garmin Connect, and Apple Health, allowing you to track your progress seamlessly.

Features

  • Powered by iFIT

    With the iFIT Pro Membership*, access over 10,000 workouts on your smart treadmill. Just press start, and your machine auto-adjusts to match the trainer’s pace and terrain. SmartAdjust will scale any workout up or down based on your fitness level. (Pro Membership Required)

  • 24″ Pivoting touchscreen with streaming

    The 24″ HD touchscreen pivots for optimal viewing, whether you’re running or following off-treadmill classes like yoga and strength. With the iFIT Pro Membership*, stream your favorite shows and movies. (Pro Membership Required)

  • 0-12 MPH

    Run, jog, or walk with speeds up to 12 MPH. Perfect for home workouts, cardio training, and endurance building.

  • 40% Incline to -6% decline training

    Train smarter with a 40% incline to -6% decline range. This incline treadmill brings hills and terrain training right into your gym. It helps target more muscle groups and supports training for races, hikes, and long-distance goals.

  • SpringFlex cushioning

    Run or walk comfortably on the SpringFlex cushioning system, designed to absorb impact, ideal for long runs, hill sprints, or recovery sessions.

  • Smartadjust

    iFIT’s SmartAdjust automatically adapts your treadmill’s speed and incline in real time based on your workout history and performance. The more you train, the more your workouts evolve. (Pro Membership Required)

  • Heart‑rate control with activepulse

    ActivePulse uses your Bluetooth-enabled HR monitor (sold separately) to keep you in the ideal heart rate zone, automatically adjusting speed and incline for better results. (Pro Membership Required)

  • Personalized AI coaching

    Interact with iFIT AI Coach via SMS for personalized guidance and insights to help you achieve your fitness goals. AI Coach can create workout plans and have your next workout loaded to your equipment home screen, offer tips for recovery, and more! (Pro Membership Required)

  • Sync with fitness apps

    Seamlessly sync workouts with Strava, Garmin Connect, and Apple Health. Track pace, calories, elevation, and performance all in one place via the iFIT app. (Pro Membership Required)

  • Create custom workouts

    Build custom workouts by specifying time‑based intervals: choose speed, incline, and duration per segment. Create map‑based routes using Google Maps with terrain simulation and Street View for an immersive walking or running experience. (Pro Membership Required)

Specifications

  • Color
    Black
    Membership Program
    iFit
    Motor Rating
    4.25 horsepower
    Maximum Speed
    19 miles per hour
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Reviews

  • Customer reviews from NordicTrack
    See all NordicTrack reviews
  • Rated 4 out of 5 stars

    Good with Room to Improve

    I've had this treadmill for about a year now and overall would say the experience with it has been positive. Pros: 1. Delivery and assembly was easy and straightforward. 2. The 24 inch screen is immersive with good clarity and touch responsiveness. 3. The incline range is more than one could ever want and the auto incline feature during the workout videos really adds to the immersive feel. 4. The deck feels great to run on and the cushioning is a nice feature. 5. The large variety of ifit workouts that are offered keeps running indoors interesting and fun. Cons: 1. Individual speed and incline buttons on the side of the screen, like the commercial x22i (older model) had, would be a great improvement to this machine. When running fast, it is much easier to hit a specific MPH button than it is to try and hit the correct spot on the touch screen. While there is a stop button and the safety line, needing to slow down in a hurry doesn't always require a stop or pause in the workout. 2. When running at or above 7MPH, the deck gets quite loud and sounds as though one of the plastic cover pieces is banging against another part of the machine. It really increases the overall machine noise and is probably my biggest gripe with the machine. 3. Given the screen is such a key component of this machine and off-machine workouts are part of ifit, it would be nice if the screen could be tilted downward in addition to the rotation. It is hard to view the screen if you are doing yoga, palates, etc. , from the floor. Overall, despite the cons, I would recommend this machine to a friend. I use it heavily during the winter months and look forward to each new workout that I try on iFit. This machine is good for beginner all the way up to competitive runners.

    Originally posted on iFIT inc.

    Posted by Garth B

  • Rated 5 out of 5 stars

    Amazing

    The X24 treadmill is life changing. It's a trainer, motivator, and exercise partner rolled into one. The automated functions, sturdy build, and excellent features provide so many ways to not only "free" the burden of exercise but entices us to go workout on it everyday. I find myself thinking about it and looking forward to getting myself active. The X24 gives me a workout from high or low intensity that fits my mood and motivation at every moment. The way the treadmill speeds up and slows down and inclines and declines automatically following the iFit courses serve as an awesome exercise partner and guide. On top of that, the great trainers on the iFit programs and the beautiful sceneries are great value adds to motivate me to get back on the treadmill everyday. The international courses provided a great way to prepare for our vacation. We previewed of running and waking courses in Rome and Florence when we were planning our vacation allowing us to get familiar with both cities prior to our trip! I must say that I have been working out daily because of this treadmill because it makes it so simple - whether I feel a bit low on motivation, I can choose to stay indoors and do a walking routine or if I'm energized to do more but the weather outside is not so amenable, I can go on an aggressive run that really challenged and enhanced my fitness. This treadmill has even motivated my spouse to exercise like never before which is quite impressive. I am so glad to have made the investment in my and my family's health. My spouse and our two kids all use it so much I'm thinking I need a second one! The X24 with the big screen is so awesome.

    Originally posted on iFIT inc.

    Posted by Richard

  • Rated 5 out of 5 stars

    Outstanding Treadmill - Worth Every Penny!

    I've been using my X24 Treadmill for almost six months, and I couldn't be happier with my purchase. The build quality is excellent, the touchscreen display is crystal clear, and the workouts are engaging and easy to follow. It runs smoothly and quietly, which makes it perfect for home use. The incline and speed adjustments are seamless, and I really appreciate how sturdy and stable it feels during every run. Overall, this treadmill has exceeded my expectations in every way - it keeps me motivated and makes my workouts something I actually look forward to. Highly recommend it to anyone looking for a top-of-the-line treadmill!

    Originally posted on iFIT inc.

    Posted by Lazhar M

  • Rated 4 out of 5 stars

    It's good. Software not great.

    The build, comfort and all on the hardware is great. The software is glitchy and we have problems booting up and have had issues with the screen- spent hours with call center helper from Bangladesh or wherever- they were ok... but, still crashed and had issues after

    Originally posted on iFIT inc.

    Posted by Jonathan

  • Rated 3 out of 5 stars

    unpredictable

    The screen has unpredictable results, Example ( crank it up to 7 MPH touch the screen to slow down to 4 MPH and nothing happens, after several attempts touch the screen at 3 MPH and it slows to MPH then hit 4 MPH and you get what you want. This happens a lot, I don't know if it's the screen or the programing. I'd like to talk to someone and have it remedied if possible. I've put over 437. 93 miles on it to date.

    Originally posted on iFIT inc.

    Posted by John P

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Pros for NordicTrack - X24 Treadmill with 40% Incline for Strength and Cardiovascular Health - Black
There were no pros for this product—Overall Performance, Screen Size, Cushioning, Incline Adjustment, Noise LevelThere were no pros for this product—There were no pros for this product—

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