Alter G

woman walking on an alter G tredmill

The Alter G treadmill uses differential air-pressure technology originally developed by NASA as a way for astronauts to exercise and maintain conditioning in space. Now, this technology is used in medical facilities, hospitals and physical therapy clinics to help patients rehabilitate from illness and injuries.

This machine is capable of reducing the user’s body weight by as much as 80% in order to maximize mobility. This equipment can be used on a variety of patients, from older adults combating reconditioning to elite level athletes recovering from lower body orthopedic surgeries and everyone in between. Available in our Greenwich and Westport locations.

Who can benefit

The Alter G is useful in limiting the amount of weight and forces through joints. Clients who are rehabbing from an injury and can’t fully bear weight on an extremity find that the Alter G is useful in helping return to proper walking and running form.

High performance athletes also use the Alter G when training. For example, runners will work Alter G sessions into their training regimens to allow for longer distance runs without the wear and tear that occurs when running outside or on a regular treadmill.


What is the unweighting range of the Anti-Gravity Treadmill?


The unweighting range of Alter G Anti-Gravity Treadmills ranges from 100% to as little as 20% of the user’s body weight.

What is the weight range of the Anti-Gravity Treadmill?


The weight range of the Alter G Anti-Gravity Treadmills is for individuals 85 to 400 pounds.

How fast can the Anti-Gravity Treadmill go?


0-12 mph for most models.

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