TL;DR

Curved treadmills are self-powered, require no electricity, burn more calories at equivalent speeds, and are virtually maintenance-free. Motorised treadmills offer precise speed and incline control, higher top speeds, and a more familiar running experience. VERVE sells both — the Curved Treadmill for functional fitness and HIIT-focused facilities, and the Velocity and Kuro commercial motorised treadmills for traditional cardio training.

How a Curved Treadmill Works

A curved treadmill (also called an air runner or manual treadmill) has no motor. The belt is curved at both ends, and the runner powers it entirely through their own stride. Walk or run further up the curve to go faster; slow down and the belt decelerates naturally.

This design creates a fundamentally different running experience:

• You drive the belt — the machine doesn't drive you
• Speed changes are instant and intuitive (no buttons, no lag)
• The curved surface promotes a natural forefoot or midfoot strike pattern
• Your posterior chain (hamstrings, glutes, calves) does more work than on a flat motorised belt

How a Motorised Treadmill Works

A motorised treadmill uses an electric motor to drive the belt at a set speed. The runner keeps pace with the belt. Speed and incline are adjusted via controls on the console.

Modern commercial motorised treadmills like the VERVE Velocity feature:

• 4CHP Perpetua Motor with speeds up to 24 km/h
• Incline range of 0-15%
• 580x1600mm running surface
• 150kg weight capacity

The VERVE Kuro offers a 3.0KW AC motor, 0-20% incline, 600x1600mm surface, and is available with a 21.5" touchscreen option.

Head-to-Head Comparison

Calorie Burn

Research consistently shows curved treadmills burn 20-30% more calories at equivalent perceived effort levels compared to motorised treadmills. A 2018 study in the Journal of Science and Medicine in Sport found that self-powered curved treadmills required significantly higher physiological demand (heart rate and oxygen consumption) at matched speeds.

This makes curved treadmills brutally effective for conditioning — but it also means they're more fatiguing, which matters for programming.

Running Mechanics

The curved surface encourages a forward lean and midfoot/forefoot strike, which many running coaches consider more biomechanically efficient. Motorised treadmills allow (and often promote) heel striking because the belt pulls the foot backward.

However, the curved surface doesn't perfectly replicate outdoor running. It's a different movement pattern — excellent for conditioning, but not a 1:1 substitute for road or track training.

Speed Control

Curved: infinite speed variation based on your stride position. Instant acceleration, instant deceleration. Perfect for interval training (sprints, Tabata, EMOM workouts).

Motorised: precise, repeatable speed settings. Press a button, hold a pace. Better for steady-state running, pace training, and rehabilitation protocols where exact speed control matters.

Incline

Curved treadmills have no incline adjustment — the curve itself provides resistance. Motorised treadmills offer adjustable incline (up to 15-20% on commercial models), allowing you to simulate hills, increase difficulty, and target different muscle groups.

Noise

Curved treadmills are quieter than motorised — no motor hum, no belt drive noise. The only sound is your footstrike on the belt. For home gyms and noise-sensitive environments, this is a significant advantage.

Maintenance

Curved: minimal. No motor to service, no belt to lubricate, no electronics to fail. The belt and bearings are the only wear components.

Motorised: regular maintenance required. Belt lubrication, motor inspection, deck cleaning, and electronic component checks. Commercial treadmills need professional servicing 1-2 times per year minimum.

Electricity

Curved: zero electricity needed. Place it anywhere — garage, outdoor covered area, off-grid gym.

Motorised: requires a dedicated power outlet. Commercial treadmills draw significant current — plan your electrical capacity accordingly.

Footprint

Both types are roughly similar in footprint. Motorised treadmills tend to be slightly longer and heavier. The VERVE Velocity measures 2220x910x1600mm. Curved treadmills are typically shorter.

When to Choose a Curved Treadmill

• CrossFit boxes and functional fitness facilities
• HIIT and interval training focus
• Home gyms where noise and electricity are concerns
• Facilities that want minimal maintenance
• Sprint and sled-push conditioning alternatives
• Group training environments (no speed buttons to fumble with)

When to Choose a Motorised Treadmill

• Traditional commercial gyms with dedicated cardio zones
• Runners training for specific paces and distances
• Rehabilitation and physiotherapy settings
• Members who want incline walking/running
• Facilities that want entertainment features (touchscreens, streaming)

Can You Have Both?

Many well-equipped facilities stock both. Curved treadmills in the functional training area for conditioning work, motorised treadmills in the cardio zone for steady-state running. It's not an either/or decision if your space and budget allow.

VERVE Treadmill Range

• VERVE Curved Treadmill: Self-powered, no motor, no electricity required. Built for commercial and home use.
• VERVE Velocity Full Commercial Treadmill: 4CHP motor, 1-24 km/h, 0-15% incline, 580x1600mm running surface, 150kg capacity.
• VERVE Kuro Commercial Treadmill: 3.0KW AC motor, 1-24 km/h, 0-20% incline, 600x1600mm surface.
• VERVE Kuro with Touchscreen: Same specs as Kuro plus 21.5" TFT touchscreen.

All VERVE treadmills carry a 5-year frame warranty and 1-year parts and monitors warranty for both home and commercial use. Check current pricing at vervefitness.com.au.

Frequently Asked Questions

Are curved treadmills harder to run on?

Yes. Because you're powering the belt yourself, the same speed requires more effort than on a motorised treadmill. Most people run 1-3 km/h slower on a curved treadmill at the same perceived effort. This is a feature, not a bug — it makes them more effective for conditioning.

Can you walk on a curved treadmill?

Yes. Walking on a curved treadmill is gentler than running and provides a natural-feeling stride. It's a solid low-impact cardio option and a good way to build familiarity with the machine before running.

Do curved treadmills need maintenance?

Very little. No motor servicing, no belt lubrication, no electrical components to maintain. Periodic inspection of the belt and bearings is all that's typically required.

Which treadmill is better for weight loss?

Curved treadmills burn more calories per minute at equivalent effort. However, the best treadmill for weight loss is the one you'll actually use consistently. If you prefer running at set paces with incline variation, a motorised treadmill may keep you more consistent.