AlterG® Anti-Gravity Treadmill™ technology combines precision unweighting technology with real-time gait analytics and video feedback
ALTERG® ANTI-GRAVITY TREADMILL™ TECHNOLOGY
The AlterG® Anti-Gravity Treadmill™ integrates patented, NASA Differential Air Pressure (DAP) technology, a precise air calibration system, and real-time information to change what’s possible in rehab and training. Using a pressurized air chamber to uniformly reduce gravitational load and body weight in precise 1% increments, AlterG enables patients and athletes to move unrestricted and pain-free – restoring and building muscle strength, range of motion, balance, function, and fitness. No other unweighting technology offers as much freedom, control, and versatility.

Using air to unweight patients and athletes enables an unprecedented level of comfort and mobility – without impeding natural gait mechanics.
NASA-based technology applies positive air pressure to gently unweight users in 1% increments to as low as 20% of their body weight – quickly, effortlessly, and precisely.
Users calibrate their effective body weight based on their comfort level to achieve pain-free movement or to allow for partial weight bearing exercise as tolerated.
Real-time gait analytics and live video feedback allow users to understand their movement patterns and make corrections on the fly for faster, better outcomes.
The positive air pressure chamber and fall-safe environment enable the controlled progression of weight-bearing activity and training volume – without impact on joints or risk of injury.
Unlike harness systems and hydrotherapy, AlterG’s technology can be effective for patients across a broad spectrum of diagnoses and therapeutic stage.
HOW DIFFERENTIAL AIR PRESSURE WORKS
FIT
VIA
PRO
SPECIFICATIONS | ![]() ![]() |
![]() ![]() |
![]() ![]() |
![]() ![]() |
![]() ![]() |
|
---|---|---|---|---|---|---|
Woodway Treadmill | - | - | - | - | Included | |
Body Weight Adjustment | 100% down to as little as 20% in 1% increments | |||||
Body Weight Adjustment | 100% down to as little as 20% in 1% increments | 100% down to as little as 20% in 1% increments | 100% down to as little as 20% in 1% increments | 100% down to as little as 20% in 1% increments | 100% down to as little as 20% in 1% increments | |
Stride Smart | - | - | Included | Included | Included | |
Live Video Monitoring | Optional | Optional | Included | Included | Included | |
AlterG Assistant | Optional | Optional | Included | Included | Included | |
Speed | 0 mph to 12 mph | 0 mph to 15 mph | -3 mph to 12 mph | -5 mph to 15 mph | -10 mph to 18 mph | |
Starting Speed | 0.1 mph | 0.5 mph | 0.1 mph | .5 mph | .1 mph | |
Incline | Optional | Optional | 0% to 15% | 0% to 15% | 0% to 15% | |
User Weight | 85 lbs to 400 lbs | 85 lbs to 400 lbs | 85 lbs to 400 lbs | 85 lbs to 400 lbs | 85 lbs to 400 lbs |