Defy the effects of gravity. Enhance freedom of movement.

Redefine what’s possible in rehab and training.

Calibrated Differential Air Pressure

AlterG® Anti-Gravity Treadmill™ technology combines precision unweighting technology with real-time gait analytics and video feedback. No other unweighting technology offers as much precision, accuracy and comfort than AlterG.


AlterG® FIT

The FIT Anti-Gravity Treadmill is AlterG’s easiest-to-use and most affordable Anti-Gravity Treadmill for pain-free physical rehab and training. Combines NASA Differential Air Pressure (DAP) technology with session reports, pain recording and live video monitoring.


AlterG® VIA

The VIA Anti-Gravity Treadmill opens new and innovative data-driven possibilities. Combines patented, NASA Differential Air Pressure (DAP) technology, a low-step in height, an intuitive touchscreen interface, real-time gait analytics, and live video monitoring.


AlterG® PRO

The AlterG® PRO Anti-Gravity Treadmill™ offers elite athletes the ultimate in injury recovery and training. Combines NASA Differential Air Pressure (DAP) technology, top of the line slat belt treadmill, real-time gait data and live video feedback.

AlterG® is joining forces with ReWalk® Robotics, the leading provider of solutions in NeuroRehabilitation

ReWalk Robotics is propelled by a clear mission: to fundamentally improve the quality of life for individuals with injury and disability through innovative technologies that enable mobility and wellness in rehabilitation and daily life.

The ReWalk Personal Exoskeleton is the most widely used personal exoskeleton and offers individuals living with spinal cord injury a new level of freedom to stand and walk during activities of daily life, and even to navigate real-world obstacles such as stairs or curbs. In addition to the exoskeleton, ReWalk’s portfolio of complementary products spans the continuum of care from the clinic to the community, and includes the ReStore™ Exo-Suit for Stroke Rehabilitation and the MyoCycle Home and Pro FES cycling product lines.


Who We Help

Our Anti-Gravity Treadmill™ technology empowers people to move in new ways and without pain – to recover mobility, improve wellness, and enhance physical performance. In fact, AlterG can be found in over 5000 facilities around the world and has helped millions to safely and consistently reach their goals and achieve better outcomes.



Remove barriers for your clients and advance your practice with the AlterG Anti-Gravity Treadmill™ system for physical therapy, rehabilitation and sports performance. Unique technology allows for normal gait and balance unlike hydrotherapy or harnesses – for superior weight-supported walking, running, and closed kinetic-chain exercise.



An AlterG Anti-Gravity Treadmill™ system will help you experience a level of freedom you may not have thought possible. Whether you want to get back to life as quickly as possible after orthopedic injury or surgery, or you want to gain strength and endurance while managing a neurological condition, chronic disease, or obesity – AlterG can give you new power to achieve your goals.



For athletes interested in rehabbing faster, training while protecting or recovering from an injury or surgery, or increasing training volume while minimizing stress-related injuries, AlterG allows you to achieve your goals sooner and smarter. AlterG’s Anti-Gravity Treadmill™ technology is a cornerstone in the training rooms of professional sports teams, Olympic training centers, and sports science facilities around the world.


Rehab Facilities


Sports Teams


Patients & Athletes

“AlterG has enhanced our ability to expedite certain phases of our rehabilitation protocols and has eliminated some of the unknowns that we used to face prior to returning to the playing surface.”

— Rod Martin, HATC, Oakland Raiders

“Greatest invention ever! It helped me run for the first time in almost a year. You couldn’t wipe the smile off my face the first time I ran in it. Love it, love it, love it.”

— Tammy Chapman, Patient

“Beyond helping runners, we found countless ways to integrate the Anti-Gravity Treadmill into a broad variety of patient care plans – to help them achieve better outcomes. Patients look forward to their next visit.”

— Bryan Graham, MPT, Oceanside Physical Therapy

“AlterG therapy really gives people opportunities they wouldn’t have otherwise.”

— Gregg Dahlgren, Family Physical Therapy And Sports Center

“The Anti-Gravity Treadmill has had quite an impact on our practice – considering both patient outcomes and clinical efficiencies. We have come to rely on it to help us provide exceptional care for a variety of patient conditions.”

— Kimberly Huey, PT, DPT, Elite Sports Physical Therapy (ESPT)

“I’ve suffered my whole life with congenital hip dysplasia. Typically I can’t walk more than a couple of blocks without intense pain. And I ran a mile today, for the first time in my life. Thank you!”

— Sammy Rose, Patient

“We’re seeing a greater range of patients and the AlterG has allowed us to treat patients earlier. Rather than 6–8 weeks post-op, we are now treating patients at 3–4 weeks post-op.”

— Bryan Nadeau, PT, Muir Orthopedic Specialists

“Having AlterG has been instrumental in both rehabilitation and the overall conditioning of our players. Beginning movement earlier in the rehab process has been critical to earlier returns to the court.”

— Aaron Nelson, MS, ATC-L, PES, CES, Phoenix Suns

How Does It Work?

The AlterG® Anti-Gravity Treadmill features patented, NASA Differential Air Pressure (DAP) technology, a precise air calibration system, based on the user’s actual body weight, 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 precision, accuracy and comfort.

Why it Works


About AlterG

Since 2005, the AlterG® Anti-Gravity Treadmill™ has changed the way athletes and diverse patient populations rehabilitate and train. During this time, AlterG has inspired a growing body of research, case studies and protocols spanning orthopedics, sports medicine, neurological disease, chronic condition management, and much more.

Interested in Learning More?