3 Best Treadmills for Interval Training (HIIT) in 2025

Key Takeaways

• The ST90, TT8, and F80 treadmills are built to handle quick speed shifts, tough workouts, and intense sprints, perfect for serious HIIT training.
• With features like a slat-belt system, roomy decks, and advanced shock absorption, your joints stay protected no matter how hard you go.
• If you’re tight on space, the F80 folds up easily. For more stability, the TT8 holds steady through the toughest sessions. There’s a setup that fits right into your home routine.
• Big touchscreens, Bluetooth, WiFi, charging ports, and app support keep every session connected, fun, and easy to track.
• SOLE treadmills bring gym-level strength and smart cushioning together, so you can go all out on intervals without beating up your body.

Why Use a Treadmill for HIIT?

Treadmills built for HIIT offer benefits that standard cardio treadmills cannot match:

• Precise speed and incline adjustments: Essential for structuring intervals and progressions.
• Consistent environment: Weather- and terrain-independent, letting you stay focused on intensity.
• Safety and shock absorption: Reduces impact vs. outdoor pavement, especially with advanced belt and deck systems.
• Performance tracking: Built-in session feedback enables smarter training cycles.

Best Treadmills for Interval Training (HIIT) in 2025

1. ST90 Treadmill

The SOLE ST90's unique slat-belt design mimics outdoor track running while providing commercial-grade performance and ultimate joint protection for serious HIIT training.

Best for: Ultimate Joint Protection & Commercial-Grade HIIT

If you're serious about sprint intervals and want a machine that can handle the impact, the ST90 is built for you. It features a slat-belt design that’s not just cool to look at, it actually mimics outdoor track running and dramatically reduces joint stress. This commercial-grade treadmill is as close as you’ll get to a gym-level setup in your home, and it’s incredibly stable, even at high speeds.

Powered by a 2.0HP AC motor, it delivers smooth, consistent power while you push through intervals. The slat belt measures 60" x 20", giving you plenty of room to open up your stride, and the cushioning is high quality, perfect for anyone dealing with past injuries or joint sensitivity. The 15.6" touchscreen gives you a bright, intuitive interface to track stats or stream your favorite workouts, and with WiFi, Bluetooth, USB ports, and wireless charging, it’s fully connected. It supports up to 400 lbs and is built with a heavy-duty steel frame, so it's rock-solid and ready for explosive training.

If you need reliable performance, minimal impact, and a machine that keeps up with every sprint and recovery, the ST90 is a strong contender, especially for those who want a commercial gym experience without leaving the house.

2. TT8 Treadmill

The SOLE TT8's motorized incline and decline capabilities bring hill sprints and downhill recovery training right into your home HIIT workouts.

Best for: Advanced Incline and Decline Variety

Want to push your HIIT workouts beyond the flat belt? The TT8 makes it possible with one major feature: motorized incline and decline. That means you can mimic hill sprints and even downhill recovery jogs, giving you an edge in training for real-world terrain or just adding some variety to your intervals.

With a monster 4.0 HP motor, one of the strongest in the category, the TT8 powers up to 12 MPH without breaking a sweat. The 22" x 60" running deck gives plenty of space for long strides or side shuffles, and it feels incredibly stable thanks to its non-folding, rock-solid frame. You’ll appreciate that when you’re going all out at max incline.

The large touchscreen display is easy to use and offers detailed performance tracking, pre-set programs, and streaming options. You can connect through Bluetooth, use the SOLE+ app, and even charge your devices on the go. If you’re serious about building lower-body strength while keeping your intervals fresh, the TT8 offers the kind of training versatility most treadmills can’t match.

3. F80 Treadmill

The SOLE F80's foldable design and 3.5HP motor deliver commercial-grade HIIT performance perfect for compact home gyms without sacrificing running space.

Best for: Compact Spaces and Versatile HIIT

Need high performance but don’t have a ton of room? The F80 strikes that sweet spot between commercial-grade power and home-friendly convenience. With a foldable frame and smooth 3.5 HP motor, it’s ideal for intense intervals without dominating your space.

It's 22" x 60" running surface gives you the same support you’d expect from a full-sized treadmill, while the 15 incline levels and 12 MPH top speed let you hit everything from slow uphill climbs to all-out sprints. The 10.1" touchscreen makes tracking workouts simple and engaging, with apps, entertainment, and a built-in charging pad to keep your devices juiced.

Shock absorption is solid too; it’s on par with much bulkier commercial models, so your knees and joints won’t take a beating. And when you're done? Just fold it up and reclaim your floor space. The F80 is a great choice for apartment dwellers, shared households, or anyone who wants HIIT flexibility without sacrificing square footage.

Side-by-Side Technical Comparison

How to Maximize Your HIIT Sessions

Sample HIIT Workouts for Treadmills

• Classic Tabata: 20-sec sprint @ 90% max speed, 10s walk/stop, 8 rounds.
• Incline Intervals: 1-min run @ 10% incline, 1min walk @ 0% incline, 5 rounds.
• Hill Sprints: 30-sec all-out sprint @ 12% incline, 90s walking recovery, 6 rounds.
• Decline Sprints (TT8 only): 20-sec sprint @ -3% decline, 40s walk, 8 rounds.

Tips

• Always warm up 5–10min at a comfortable speed/incline first.
• Use the treadmill’s speed/incline quick keys for fast transitions.
• Use the display/console to monitor heart rate and recovery.

Treadmill Buying Guide for HIIT Enthusiasts

Key Features to Prioritize

If you're serious about HIIT, look for a treadmill with a strong, responsive motor—3.0 HP or more is the sweet spot for smooth sprinting. Quick speed and incline changes are a must, so skip anything that lags. A wide, extended belt (at least 20" x 60") gives you room to move without feeling cramped. Shock absorption matters too; slat belts or high-end cushioning will go a long way in keeping your joints safe. For stability, a heavier frame is better, especially if it’s non-folding. And don’t overlook the console; large displays with app support and wireless charging can make your intervals a whole lot smoother.

Step into Power and Precision with SOLE Fitness Treadmills

SOLE treadmills bring gym-quality performance home with powerful motors, smart tech, and cushioning systems that protect your joints during every workout.

SOLE treadmills are built for real performance at home. You get lasting durability, smooth power, and smart tech that makes every run feel like a gym session.

We use motors up to 4.0HP and wide running decks for a quiet, reliable feel underfoot. Cushion Flex and slat-belt designs help protect your joints while you push your limits.

Our tech keeps things simple and connected. Bluetooth, WiFi, wireless charging, and built-in apps are ready when you are.

There’s something for everyone: folding models like the F80, heavy-duty builds like the TT8, or our slat-belt ST90 for that next-level feel.

Speed and incline change fast. No delays, just smooth transitions between sprints and recovery. Most treadmills support up to 400 lbs and come with easy-to-use consoles, speakers, USB charging, and tablet holders.

You can jump into a preset workout, track your heart rate, or customize every session. Want more? Pair with SOLE+ or stream your favorite shows while you train.

Our full line covers every goal. You’ll find ellipticals, bikes, rowers, and accessories like mats, heart monitors, and resistance bands.

SOLE helps you stay consistent, strong, and in control—every step of the way!

Check out our lineup here!

Frequently Asked Questions (FAQ)

What makes a treadmill ideal for HIIT and interval training?

A great HIIT treadmill allows for rapid speed and incline adjustments, powerful continuous-duty motors, ample running space, and excellent cushioning. These features enable smooth transitions between sprints and recoveries while minimizing impact on joints.

How does the slat-belt system in the ST90 benefit HIIT workouts?

The slat-belt design enhances shock absorption, providing a more natural running feel and reducing stress on joints. This makes it especially effective for the repetitive high-intensity demands of HIIT.

Can folding treadmills like the F80 handle intense interval sprints?

Yes! The F80 has a stable, powerful platform and advanced cushioning, rivaling many non-folding treadmills. Its design makes it especially suitable for users with limited space who don't want to sacrifice performance

What features should I prioritize when selecting a treadmill for HIIT?

Look for treadmills with powerful, responsive motors, fast speed and incline adjustments, large running decks (at least 20" x 60"), and superior shock absorption. These features help deliver smooth transitions between intense intervals and protect your joints during high-impact sprints

What other equipment does SOLE Fitness offer?

Besides treadmills, SOLE Fitness provides ellipticals, stationary and recumbent bikes, rowers, rower-ski machines, and a variety of strength accessories. This all-in-one lineup lets you build a comprehensive, high-performance home gym adapted to any fitness style.