AlterG® Via Anti-Gravity Treadmill®

The new Via Anti-Gravity Treadmill from AlterG provides your patients a rehab and training experience unlike ever before. Using NASA-developed Differential Air Pressure (DAP) technology, you can apply gentle lifting forces using air to unweight patients to as little as 20% of their bodyweight, and enable a precisely adjustable reduction in impact and gravitational forces while walking, running, or during closed-kinetic chain exercise.


Harness the Power of Data-Driven Body Weight Supported Therapy

The Via Anti-Gravity Treadmill with integrated Stride Smart gait analytics measures gravitational load and provides simplified visual feedback on gait symmetry and impact on pain levels, making it easy for you and your patients to work on improvements in real time. With the new, intuitive, touchscreen cockpit you will easily identify and control the direct effects of unweighting on gait and pain levels, engaging patients in therapy and establishing the optimal rehab plan based on their specific needs.

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Defy Gravity and Get Your Patients Back to Good Again

Weight Bearing Symmetry

Improves balance control and reduces risk of pain and joint degeneration from overuse in the unaffected leg.

Step Length Symmetry

Improves symmetry for increased step length, better walking speed, more efficient gait, and reduced fall risk.

Stance Time Symmetry

Helps patients correct asymmetries to achieve increased step length, walking speed, and improved stance time.


Improvements can lead to faster gait, better mobility, and improved health.

Pain Recording

Correlating gait and unweighting with patient-reported pain scores helps establish optimal parameters for therapy.

Live Video Monitoring

Helps patients see and understand abnormal gait patterns they may not feel, empowering them to better engage in improved movement.

The AlterG Assistant

Maximize your time and productivity by utilizing AlterG’s pre-programmed, fully automated therapy sessions or develop your own library for patient-customized experiences.


Two Via Models for Your Specific Needs

The full-featured Via 400 is ideal for rehabilitation applications. The 400X features a more robust drive mechanism, making it more appropriate for more intensive sports training applications.

VIA 400 VIA 400X

Body Weight Adjustment 100% to as low as 20% in as little as 1% increments 100% to as low as 20% in as little as 1% increments
Stride Smart Gait Analytics Included Included
Live Video Included Included
AlterG Assistant Included Included
Speed 0–12 mph 0–15 mph
Starting Speed 0.1 mph 0.5 mph
Reverse -3 mph -5 mph
Incline 15% 15%
User Weight 85–400 lbs 85–400 lbs

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