Instrumented Treadmills 
have large force platforms as base, that provide Ground Reaction Force from each foot in each Gait Cycle
If Treadmill is large, then close to natural Feet Strike can be achieved, without chances of partial steps or mis steps, as happens in the Force Platforms, embedded in a walk way. They also save on required lab space although are expensive to purchase, initially. Other important application of Instrumented treadmills is Omni Directional Treadmills that are used for locmotion in Immersive Virtual Reality, Simulated environment.

MotekForceLink:

MotekForceLink makes durable, reliable and precise Instrumented 

treadmills and also offer very large and odd-sized treadmills for custom specifications.

Single and Dual Belt-Vertical only:
 The Vertical-Only instrumented treadmill only has a vertical forceplate under the belt. This is a low-cost solution which provides much information with very limited resources.
Single Belt-6 Component: A 3D single belt instrumented treadmill can measure all 6 force and moments, resulting in accurate determination of: - Centre of Pressure (COP) in the horizontal plane - Total vertical force Fz - The shear forces Fx and Fy. - The torque in the plane of the surface Tz If you have an Optical Motion Capture system such as Polhmeus, Ascension, PhaseSpace, Phoenix or motion Analysis Corporation with an analog capture module, the treadmill can be analysed as if it were a forceplate. When walking, the differentiation between left and right foot is limited to the single stance phase. Our GaitFors software will do automatic detection of all phases of stance, including left and right detection. During running, our software can display many parameters, differentiated to the left/right foot. There are two concepts we use for instrumented treadmills: - based on the standard Bonte-OEM treadmill as built for Lode and Enraf-Nonius. This is a low-cost solution, suitable for most uses. - a custom built sport/medical treadmill. This configuration combines high performance in speed, inclination and high accuracy force measurement.
  1. Dual Belt-6 Component: 
    The speed of two belts in this treadmill are controlled separately. This supports the an asymmetric gait
     pattern of a person. Dual Belt systems are used in rehabilitation with the purpose to eliminate the hassle of missed or partial steps. Forcelink offers a Dual belt treadmills in several force measurement systems: - a simple Dual Belt treadmill with or without Fz force measurement capabilities (1D) - with 3D force measurement capabilities. An automatic belt steering ensures a minimal gap between the 2 belts. This system optimises your gait analysis in both walking and running. The high-end treadmills, with more then 30 years of experience behind them, come with 2 full servo motorunits for speeds from absolute 0 in steps of 0,1 km/hr with a 2% accuracy. Speed control independent on 2 belts. Optionally, slow or fast pitch, negative angles, extreme angles and perturbations are available, to give optimal research and analysis capabilities. An Instrumented Treadmill allows for continues data collection. See: Forcelink Gaitfors© Software.
Extreme Size Treadmills: We offer a wide range of high-end treadmills in rare sizes. These are used for sport, rehabilitation and research. Please, contact us for your special wishes in specifications. Below you find examples of systems made by Forcelink.
Trondheim - Norway Size 3 x 6 meter Speed 0 - 25 km/h Inclination -5% min, +15% max Forceplate 3x3 meter Fz Hokkaido - Japan Size 2,4 x 4 meter Speed 0 - 40 km/h Inclination -10% min, +27% max Amsterdam - The Netherlands Size 3 x 6 meter Speed 0 - 40 km/h Inclination 0% min, +25% max Doshisha - Japan Size 2 x 3,5 meter Speed 0 - 30 km/h Inclination -10% min, +25% max Some other references: -
Skatemill USA : 2,4 x 4 meter (Douglas Duncan, US-olympic team Lake Placid Olympics) - Max Planck University, Germany - University Lillehammer, Norway - UMCN, Nijmegen, the Netherlands - Rehabilitation Center Heliomare,
Wijk aan Zee, the Netherlands - Rehabilitation Center Blixembosch, Eindhoven, the Netherlands.

    Flyer Dual Belt.pdf Dual Belt Videos-1, I Swing Video, Dual Belt Videos-3, Skatemill Video