What is the AMTI Tandem Instrumented Treadmill?

The AMTI Tandem Instrumented Treadmill is the most popular force-sensing treadmill in biomechanics research, featuring a unique front-to-back (tandem) split belt design. Unlike conventional side-by-side split belts, the tandem configuration eliminates gait alterations caused by widened stance — subjects walk and run naturally, while two independent six-axis force platforms capture complete bilateral ground reaction forces in real time.

Ideal for studying gait under level, uphill, and downhill conditions, the treadmill supports speeds up to 20 km/h and inclinations up to 25% grade. AMTI’s StrideWorks software automatically separates left and right limb forces and streams data directly to all leading motion capture software via USB — no additional hardware interface required.

Key Features

• Front-to-Back Tandem Belt Design: Only 3 mm clearance between belts with precise speed synchronization — subjects walk naturally without widening their stance or straddling a center gap.
• Dual Six-Axis Force Platforms: Each belt is supported by a fully integrated AMTI force plate measuring Fx, Fy, Fz, Mx, My, Mz — with 8800 N vertical capacity and 300 Hz natural frequency.
• StrideWorks Software Included: Automatically transforms front-back force data into left/right limb segregated GRFs in real-time, streaming directly into your motion capture software via USB.
• Adjustable Speed and Inclination: Belt speed 0–20 km/h; inclination 0–25% grade (14°). Reversible belts for both uphill and downhill protocols.
• Ships Fully Assembled: Arrives complete with all software pre-loaded on an AMTI-supplied PC, freestanding with caster wheels for easy repositioning within your capture volume.
• Above Ground or In-Floor Installation: Available as a standard above-ground model (with stairs) or as a recessed pit/in-floor installation flush with the surrounding floor surface.
• Seamless Motion Capture Integration: Simple digital USB connection compatible with all leading motion capture software packages out of the box.

FAQ

What is the difference between the Tandem and Side-by-Side treadmill?

The Tandem treadmill uses a front-to-back (longitudinal) split belt, so both feet land on separate but aligned belts with only 3 mm clearance. This preserves a natural gait without requiring the subject to straddle a center gap or widen their stance. The Side-by-Side model features belts side-by-side and is better suited for stroke rehabilitation protocols requiring independent left/right belt speeds.

What software is included?

AMTI's StrideWorks software is included and pre-loaded on an AMTI-supplied PC. StrideWorks automatically segregates left and right limb ground reaction forces and streams data in real-time via USB to all major motion capture software.

Does the treadmill integrate with my motion capture system?

Yes. The treadmill uses a simple digital USB interface compatible with all leading motion capture software platforms, including Vicon, Qualisys, OptiTrack, and others.

Can I use the treadmill for running as well as walking?

Yes. The treadmill supports belt speeds up to 20 km/h (12 mph) and is designed for both walking and running biomechanics research.

What are the installation options?

The treadmill is available in two installation configurations: Above Ground (free-standing, with stairs and caster wheels for mobility) and In-Floor (Pit), where the treadmill is recessed into a concrete pit or raised access floor so the belt surface is flush with the surrounding lab floor.

Is the treadmill compatible with force plate data collection software?

Yes. The integrated force plates communicate via USB and are supported natively by AMTI's NetForce and StrideWorks software, as well as third-party biomechanics data acquisition platforms.