5 Reasons Incline Treadmills Transform Your Workouts

Updated 04/10/2026

Walking or running on a flat treadmill is useful. Adding incline changes how your body works. You burn more calories at the same speed, engage different muscles, and build strength that helps in daily life. This guide explains the benefits, how to choose an incline treadmill, and which NordicTrack X Series models align with common goals.

The science and practical tips below cite peer-reviewed research and health sources so you can make an informed choice.

The 5 benefits of incline treadmill training

1. Burn more calories without running fasterAdding grade increases the metabolic cost of walking and running. At a 5% incline, the metabolic cost of walking rises by roughly 52%; at 10% it rises by more than 100% compared with level walking. You can burn significantly more calories at the same speed. [2]

2. Strengthen muscles flat training missesIncline walking and running increase activation of the posterior chain—glutes, hamstrings, and calves—more than level walking. That greater activation builds strength useful for stairs, hills, and everyday carrying tasks. [3]

3. Reduce repetitive impact on joints (with the right setup)A modest incline (1–3%) changes foot strike and can lower some repetitive impact patterns common in flat running. Combining grade with a cushioned deck further reduces stress on joints. Use a cushioned surface and progress gradually to gain the joint protection benefits. [1]

4. Adjust intensity without increasing speedGrade is an additional way to control intensity. You can walk at a challenging cardio level without sprinting. That makes incline training an effective option for high-calorie, low-impact sessions, interval hill work, and sport-specific hill preparation.

5. Keep variety and motivation highIncline allows for many workout types: progressive climbs, interval hill repeats, and guided hikes that adjust grade automatically. This variety helps prevent plateaus and keeps workouts engaging over time.

What about the 12-3-30 method?

The 12-3-30 method uses a 12% incline, 3.0 mph speed, and 30-minute duration. It became popular because it produces high metabolic demand with walking-level impact and is easy to adjust. Use it as a starting point, but progress more slowly if you’re new to incline work. Learn how to adapt 12-3-30 safely on our 12-3-30 walkthrough.

Read more about Hannah Eden's Austrian Alps new 12-3-30 Series.

Why decline matters (and why NordicTrack offers it)

Most home treadmills only incline. The NordicTrack X Series adds up to -6% decline. Decline training targets the anterior tibialis, quads, and hip flexors in ways uphill work does not and helps prepare you for downhill running in races or trail runs. If your training includes downhill segments or full terrain preparation, decline capability matters.

Learn more about decline training.

How to choose an incline treadmill, a short scorecard

Use these six criteria to match a treadmill to your goals.

1. Incline rangeWider incline ranges increase training options. If you want steep hill simulation or high-calorie walking sessions, choose a treadmill with a higher maximum grade.Target: 0–12% covers most needs; -6% to 40% supports full hill and decline training.

2. Decline capabilityDecline supports downhill muscle training and race prep.Target: If you train on trails or hilly courses, pick a treadmill with decline.

3. Cushioning systemDeck cushioning reduces impact over time. If you have joint concerns or plan long sessions, choose a proven cushioning system.

4. Motor durability and sustained powerSteep grades place continuous load on the motor. Look for motors rated for sustained incline use and supported by the manufacturer.

5. Content and auto-adjust featuresGuided, auto-adjusting workouts (trainer-led hikes, SmartAdjust, Follow Trainer) make incline training easier and safer.Note: Some features require an iFIT membership; check current plan details and compatibility.

6. Usability and footprintScreen size, console layout, and the treadmill’s footprint affect how easy it is to use at home. Larger screens can help you stay engaged during long sessions.

Quick comparison: standard treadmill vs. incline treadmill vs. incline trainer

*“Highest in home models” refers to major home treadmill brands as of 2025 based on publicly available specifications.

Incline guidance by goal and user type

• Beginners: Start at 2–5% incline and focus on time and comfort. Increase 1–2% per week as you adapt. (/blog/treadmill-for-beginners-from-burnout-to-breakthrough)

• Weight-loss walkers: 8–12% at a brisk pace burns calories effectively with low impact; the 12-3-30 format (12% / 3 mph / 30 min) is one option. Read more about incline and weight loss here.

• Runners building strength: Use 4–8% steady climbs for strength; add short 10–15% intervals for hill power.

• Endurance athletes: Train at 6–12% to mimic race climbs; use decline to practice downhill mechanics.

• Recovery days: Walk at 1–3% incline and easy pace to keep blood flowing without extra load.

A simple 20-minute beginner incline interval

• Warm-up: 3 min, 0% incline, 2.5–3.0 mph
• 3 min, 3% incline, 3.0 mph
• 3 min, 6% incline, 3.0 mph
• 3 min, 9% incline, 2.5–3.0 mph
• 2 min recovery, 2% incline, 2.5 mph
• Repeat 6% block for 3 min
• Cool-down: 3 min, 0% incline, 2.0–2.5 mph

The best incline treadmills to buy in 2026

NordicTrack X Series Incline Trainers offer a wide training range: steep uphill work, downhill simulation, and cushioned decks for long sessions. Both X16 and X24 share the same performance platform; the main difference is screen size and viewing experience. The X Series provides up to 40% incline and -6% decline, expanding the types of home workouts possible.*

*Among major home treadmill brands as of 2025 based on publicly available product specifications.

NordicTrack X16 incline trainer— compact, performance-focused

• Focus: powerful hill training in a compact size.
• Experience: steep climbs indoors, quick incline changes, cushioned strides across grades.
• Key specs: -6% to 40% incline, 4.25 CHP motor, 16-inch HD touchscreen, SpringFlex cushioning, SmartAdjust, ActivePulse, Follow Trainer.
• Best for: full training tools with a smaller screen. Shop the X16.

NordicTrack X24 incline trainer

• Focus: same training capacity as the X16, with a larger screen for long iFIT sessions.
• Experience: real-world feel on a 24-inch display, treadmill matches terrain automatically for guided climbs.
• Key specs: -6% to 40% incline, 4.25 CHP motor, 24-inch HD touchscreen, SpringFlex cushioning, SmartAdjust, ActivePulse, Follow Trainer.
• Best for: regular iFIT users who want maximum immersion. Shop the X24.

Compare X16 vs X24

iFIT features that improve training

• SmartAdjust: Trainers or workouts can change incline and speed automatically.
• ActivePulse: Heart-rate-guided adjustments maintain your target zone.
• Follow Trainer: Coaches control treadmill settings during guided classes. iFIT content and features require a compatible machine and an active iFIT membership. Learn more:

Resources

• Harvard Health Publishing. Get smart about treadmills.
• Journal of Applied Physiology / NCBI. "Predicting the Metabolic Cost of Incline Walking..."
• ScienceDirect. "The effects of grade and speed on leg muscle activations during walking."

Notes and product footnotes

• SpringFlex™ is NordicTrack’s cushioning system, designed to absorb impact and reduce stress on joints.

• SmartAdjust™, Follow Trainer, ActivePulse™, and other iFIT features require compatible equipment and an iFIT membership for full access; check membership terms for details.

• “Among major home treadmill brands as of 2025” refers to the statement about steepest incline availability and is based on publicly available product specifications.

Ready to explore models that match your goals?

Browse X Series Incline Trainers or compare X16 and X24 on their product pages.

If you’d like personalized help choosing the right treadmill for your goals, our team can guide you through options and features.

Disclaimer: The primary purpose of this blog post is to inform and entertain. Nothing on the post constitutes or is intended to be a substitute for professional medical advice, prevention, diagnosis, or treatment. Reliance on any information provided on the blog is solely at your own risk. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition, and please consult your doctor or other health care provider before making any changes to your diet, sleep methods, daily activity, or fitness routine. Do not disregard professional medical advice or delay seeking it because of information available on this blog. NordicTrack assumes no responsibility for any personal injury or damage sustained by any recommendations, opinions, or advice given in this article. Always follow the safety precautions included in the owner’s manual of your fitness equipment.