AlterG AntiGravity Treadmill

Defy Gravity

This is one of those tools that makes you wonder why only a select few clinics are making it available to the public. The AlterG has proven invaluable in rehab, fitness, movement retraining and performance training. We offer time-rental to use it (scroll down for cost information), but we offer it free to clients who are in an active course of physical therapy with us. We may introduce the AlterG during a treatment session, but we encourage clients to schedule time on it outside of normal therapy time to get the most bang for your buck.

The AlterG AntiGravity Treadmill  uses a unique unweighting technology developed by NASA. Air pressure is used to comfortably lift the user and allow him/her to walk or run at a fraction of their body weight. Impact is controlled by decreasing effective body weight by up to 80%, in 1% increments, allowing for precise adjustments.


Who can use it

Just about anybody! Top-level athletes, orthopedic and neurological patients, children, seniors and those looking to lose weight

What it's good for

Allowing you to walk or run with no pain while maintaining a normal gait

Train without pain and reduce the stress to joints and muscles, and injured areas of your lower body

Lose weight and exercise more intensively while unweighted

Orthopedic / Wellness / Weight loss Patients / Clients

Reduce gravity’s impact on your joints with the Anti- Gravity Treadmill and run/walk without pain

Walk or run with no pain while maintaining a normal gait so you can continue to stay in shape

Reach your weight loss goals without pain and experience what it feels like to be at your target weight on the Anti-Gravity Treadmill

Athlete Patients / Clients

Push your training sessions further and longer with less risk of injury

Easily track progress during training and rehabilitation with precise unweighting

Senior Patients / Clients

The Anti-Gravity Treadmill can help you walk or even jog further, faster and with more stability than you may have previously thought possible

Maintaining your health and wellness on the Anti- Gravity Treadmill can help you achieve more independence in your day-to-day life

Exercise when you otherwise might not be able to because of pain, stress, or instability


  1. Free to clients undergoing active therapy with Prevail Physical Therapy
  2. Pay-for-use #1*: $0.50 per minute. Best for intermittent use or if only planning a few sessions
  3. Pay-for-use #2*: $100 unlimited use (during facility hours). Great for long-term use, or if being used for regular training/exercise sessions.
  4. Users are required to purchase their own AlterG shorts if they plan on using the AlterG for longer than 2 months. Purchase shorts here.

*If users are not active clients of Prevail Physical Therapy, we will attempt to provide limited guidance based on user’s history, injury and goal information that we are aware of, but it must not be construed as an exercise prescription that we prescribe for clients that have undergone an evaluation process with us.

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