Knowledge Base
An Introduction to Anti‑Gravity Treadmills
Anti-gravity treadmills are advanced rehabilitation and training devices designed to reduce the impact forces of walking or running. By allowing users to exercise at a lower percentage of their body weight, these treadmills enable movement with reduced strain on joints and muscles, as well as other benefits.
What is an Anti-Gravity Treadmill?
An anti-gravity treadmill, such as the Woodway Boost, is a specialised treadmill setup that simulates decreased gravity, allowing for reduced-weight bearing exercise. This effect is especially useful for individuals recovering from injuries, managing chronic conditions or undergoing post-surgical rehabilitation.
The technology traces back to the 1990s, when NASA researcher Dr Robert Whalen developed a pressurised system to help astronauts exercise in microgravity environments. The aim was to prevent muscle atrophy and bone loss during extended space missions by creating a treadmill that artificially “increases the gravity” on the user.
In the mid-2000s, Dr Whalen’s son, Sean Whalen, adapted the original design, creating a system that reduces body weight rather than increasing it, forming the basis of the modern anti-gravity treadmill.
How Does an Anti-Gravity Treadmill Work?
Anti-gravity treadmills operate using Differential Air Pressure (DAP) technology to unweight the user. To begin, the user steps into a flexible, airtight chamber that encloses the lower body and forms a seal around the waist. The system increases air pressure within the chamber to create an upward lift that supports a portion of the user’s weight.
This lifting force can be precisely adjusted, typically allowing support for 20% to 100% of the user’s body weight. This fine control enables clinicians and trainers to tailor exercise sessions based on individual needs and rehabilitation goals.
The result is a controlled, low-impact environment where users can walk or run with reduced loading on joints, tendons and muscles. The treadmill supports a full range of motion and natural gait patterns while integrated software can provide real-time feedback on factors such as gait symmetry and cadence.
This setup is particularly beneficial in clinical and sports settings, where safe progression and data-driven monitoring are essential to recovery and performance.
Effects of an Anti-Gravity Treadmill
Reduces Load on Joints and Muscles
Lowering effective body weight reduces strain on joints, tendons, ligaments and muscles. This helps users exercise more comfortably and with less pain, particularly during recovery from surgery or chronic conditions. The reduction in load also supports longer training sessions and more consistent rehabilitation progress.
Improves Range of Motion and Movement Quality
Decreased gravitational load encourages smoother, more controlled movements. This promotes joint flexibility, muscle coordination and better balance—especially important for those with mobility limitations or recovering from injury.
Supports Cardiovascular Conditioning
Anti-gravity treadmills allow for sustained aerobic exercise without overloading healing tissues. This helps users maintain or build fitness even when full weight-bearing is not advisable. The adjustable support enables gradual progression and tailored intensity.
Reinforces Proper Biomechanics
By eliminating the need for compensatory movement patterns, users can focus on correct posture, stride and alignment. Practising in a stable, low-impact setting supports better neuromuscular control and reduces the risk of poor movement habits.
Uses of an Anti-Gravity Treadmill:
Injury Rehabilitation
Anti-gravity treadmills are highly effective in post-operative and post-injury rehabilitation. By reducing mechanical stress, they enable patients to return to mobility earlier and support progressive loading strategies. This can improve circulation, joint flexibility and functional strength while lowering the risk of complications or injury.
Neurological Rehabilitation
For patients with conditions such as stroke, Parkinson’s disease or multiple sclerosis, anti-gravity treadmills provide a stable platform for gait retraining. The technology allows for repeated practice with reduced fall risk, supporting neuroplasticity and improving coordination and motor control.
Athlete Recovery and Conditioning
Athletes benefit from the ability to maintain cardiovascular fitness and refine movement technique without placing undue stress on healing tissues. The controlled environment supports gradual reintegration into sport-specific training and is well-suited for managing overuse injuries.
Weight Management and General Fitness
For individuals with higher body weight or joint sensitivity, anti-gravity treadmills offer an accessible way to exercise. The reduced impact encourages adherence and enables gradual improvement in endurance, strength and overall fitness.
Older Adults and Fall Prevention
Older individuals benefit from safe, low-impact walking practice that enhances balance, coordination and lower-limb strength. By reducing the risk of falls, the treadmill supports independence and mobility in ageing patients.
Where Can I Use an Anti-Gravity Treadmill?
Anti-gravity treadmills are typically found in physiotherapy clinics, sports medicine centres, rehabilitation hospitals and select fitness facilities. Due to their cost, size and setup requirements they are generally not used in domestic settings.
Many providers offer pay-per-session access or include treadmill use as part of broader rehabilitation and wellness programmes. Sessions are often supervised by trained clinicians or exercise professionals who can adjust settings and monitor progress.
Understanding the Value of Anti-Gravity Treadmills
Anti-gravity treadmills represent a practical solution for individuals seeking safe, effective movement. By reducing impact forces, they support rehabilitation, improve fitness and aid in mobility training for a range of requirements.
Whether used for recovery, athletic conditioning or general health, anti-gravity treadmills offer a controlled environment that balances safety with performance. Consultation with a healthcare or fitness professional is recommended to determine suitability and ensure optimal use.
Want to learn more about Anti Gravity Treadmills or are looking to acquire one for your home or business? Get in touch with Cranlea Human Performance and our in-house experts will be happy to talk you through these unique treadmills.
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