AlterG

What AlterG does

AlterG designs, manufactures, and sells Anti-Gravity Treadmills based on patented NASA-derived Differential Air Pressure (DAP) technology, which uses a calibrated pressurized air chamber to reduce a user's effective body weight in precise 1% increments from 100% down to 20%. The product portfolio spans entry-level through performance tiers — NEO, NEO+, VIA/VIA X/VIA 400-500X, FIT/FITX, M/F320, and the slat-belt PRO series — with proprietary neoprene shorts required for operation, an optional three-camera Video Monitoring System, the Stride Smart gait-analytics package, and the AlterG Assistant workout programmer. The technology is ISO 13485 and EU MDR certified and holds multiple registered patents covering air-based unweighting systems.

AlterG serves three primary customer personas: physical therapists and rehabilitation clinicians in hospitals, outpatient clinics, and skilled nursing facilities; patients recovering from orthopedic surgery, neurological conditions (stroke, Parkinson's, MS), chronic disease, or obesity; and professional and collegiate athletes and sports organizations. Over 6,000 units are installed across 5,000+ facilities in 40+ countries, with named deployments spanning the NFL, NBA, MLB, MLS, WNBA, NCAA, English Premier League, LaLiga, Bundesliga, AFL, Walter Reed, Shriners Hospitals, and U.S. military branches.

Revenue is generated primarily through one-time hardware sales of Anti-Gravity Treadmill systems (with installations requiring site surveys, dedicated electrical service, and certified AlterG Technician delivery), supplemented by recurring service contracts, extended warranties, and consumable accessories such as Lightweight Shorts ($90 per pair). US sales are executed via a direct field-sales team and inside-sales inquiry handling, while international sales flow through a network of over 40 authorized distributors. FY2022 revenue was $20 million with positive operating profit; the company was acquired by ReWalk Robotics (now Lifeward, Nasdaq: LFWD) in August 2023 for approximately $19 million and now operates as a product line within the Lifeward neurorehabilitation portfolio.

Name

AlterG

Legal name

AlterG, Inc.

Website

https://alterg.com

Company type

Private

Founded year

2005

Operating status

Acquired

Headcount range

51–100 employees

Short description

AlterG designs and sells Anti-Gravity Treadmills using patented NASA-derived Differential Air Pressure technology, enabling precise body-weight unweighting for physical therapy clinics, rehabilitation hospitals, and professional and collegiate sports organizations worldwide.

Ownership category

akta.pro rank

Product category

Medical Rehabilitation Equipment

NAICS

Medical Equipment and Supplies Manufacturing (3391)

SIC

Surgical & Medical Instruments & Apparatus (3841)

akta.pro industry

PRIMARYHLAHAMAG

Rehabilitation Therapy Equipment (PT/OT Modalities, Exercise & Balance Devices)

Healthcare & Life Sciences/Medical Devices & Diagnostics/Rehabilitation & Mobility Aids (DME)

Keywords

• Anti-gravity treadmills
• Differential air pressure unweighting
• Physical rehabilitation equipment
• Athletic training treadmills
• Gait analytics systems

Headquarters

HQ city

Fremont

HQ country

United States

HQ region

North America

Offices5 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Technology or R&D, Personnel, Marketing or Sales, Operations, Infrastructure

Revenue model

1. Anti-Gravity Treadmill Hardware Sales: AlterG generates primary revenue from the sale of Anti-Gravity Treadmill systems including NEO, NEO+, VIA, and PRO series. Treadmills are sold directly to clinics, hospitals, sports teams, and training facilities. The PRO series requires 220V/30A electrical installation. AlterG generated $20 million in revenue in fiscal year 2022 with positive operating profit.
2. Accessories and Consumables: Sale of accessories including AlterG Lightweight Shorts ($90) available in sizes from 3XS-4XL, and Performance Shorts (XS-3XL). Shorts are sold through the AlterG store and customer support.
3. Service, Maintenance, and Extended Warranties: AlterG offers comprehensive preventative maintenance services performed annually by certified technicians. Extended warranties are available for purchase as standard and extended plans. Over 30 service technicians nationally with 24-hour response and 48-hour repair commitments.
4. Debt Financing: AlterG raised $8 million in debt funding from Cortland Credit Lending Corporation in October 2021 for debt repayment, product development, expansion, and broader adoption.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels7 records

Core offering

AlterG designs, manufactures, and sells Anti-Gravity Treadmill systems (NEO, NEO+, PRO, and VIA series) that use patented Differential Air Pressure (DAP) technology to precisely unweight users from 100% down to 20% of their body weight in 1% increments. The company also sells required accessories (specialized neoprene shorts), extended warranties, and preventative maintenance services to physical therapy clinics, hospitals, sports teams, military facilities, and individual patients.

Product overview

AlterG offers a comprehensive portfolio of Anti-Gravity Treadmill products based on patented NASA-derived Differential Air Pressure (DAP) technology. The product line spans three tiers: the NEO/NEO+ (entry-level/enhanced with cost-effective positioning), the VIA Series (VIA, VIA X, VIA 400/400X, VIA 500/500X, and legacy M/F320 and FIT/FITX models), and the PRO Series (performance-focused with slat belt and highest speeds). All treadmills enable precise unweighting from 100% to as low as 20% body weight in 1% increments. Supporting products include specialized neoprene shorts required for operation, the optional Video Monitoring System (VMS) with three cameras, Stride Smart gait analytics, and the AlterG Assistant workout programming software. The company was acquired by Lifeward (formerly ReWalk Robotics) in August 2023 and rebranded in January 2024. Over 6,000 units are installed worldwide across more than 5,000 facilities.

Differentiator

Problem solved

Functional benefit

Brands

• AlterG NEO: Cost-effective Anti-Gravity Treadmill with user-friendly design and patented DAP technology for precise and consistent unweighting in physical rehabilitation and athletic training.
• AlterG NEO+
• AlterG PRO
• Stride Smart

Products and services

• AlterG NEO Anti-Gravity Treadmill Entry-level Anti-Gravity Treadmill with user-friendly design and cost-effective pricing. Features patented Differential Air Pressure (DAP) technology for precise unweighting up to 80% body weight in 1% increments, with speed range of -3 mph to 10 mph and 0% to 15% incline. Includes Stride Smart Gait Analytics and Live Video Monitoring capabilities. Targeted at a broader range of physical rehabilitation clinics and athletic training facilities.
• AlterG NEO+ Anti-Gravity Treadmill Enhanced Anti-Gravity Treadmill with all NEO features plus included Live Video Monitoring, included AlterG Assistant, optional Stride Smart Gait Analytics, intuitive touchscreen interface, and speed range of -3 mph to 12 mph with optional High Speed Package (-5 to 15 mph). Designed for diverse patient and athlete populations.
• AlterG PRO Anti-Gravity Treadmill Ultimate performance series Anti-Gravity Treadmill for athletes, featuring patented DAP technology and a slat-belt treadmill. Speed range of -10 mph to 18 mph with 0% to 15% incline. Provides up to 80% unweighting for earlier rehabilitation or increased training volume with less risk of injury. Available in Small, Medium, and Large sizes.
• AlterG VIA Series Treadmills Product line including VIA, VIA X, VIA 400, VIA 400X, VIA 500, and VIA 500X models. Gen 3 VIA launched January 2023 with wider cockpit and larger screen. Flat-belt treadmill options with varying speed capabilities from 0-12 mph to 0-15 mph, reverse speeds from -3 mph to -5 mph, and 0-15% incline. User weight limit 85-400 lbs, height range 4'8" to 6'4".
• AlterG FIT/FITX Treadmill Most accessible Anti-Gravity Treadmill, featuring low step-up height design pioneered by AlterG. Designed for broader accessibility and ease of use in physical rehabilitation and training settings.
• AlterG M/F320 Treadmill Anti-Gravity Treadmill model with speed range 0-12 mph, starting speed 0.1 mph, reverse -3 mph, and 0-15% incline. User weight 85-400 lbs, height 4'8" to 6'4".
• AlterG Lightweight Shorts Specialized neoprene shorts required for operation of the Anti-Gravity Treadmill system. Features go-around zipper that creates an airtight environment around the lower body. Available in Standard (3XS-4XL, $90 per pair) and Performance (XS-3XL) versions. Made of light, thin, and air-tight materials with warranty for free replacement if they don't last as expected.
• Service, Maintenance, and Extended Warranties Comprehensive preventative maintenance services performed annually by certified technicians, plus extended warranties (standard and extended plans). Over 30 service technicians nationally with 24-hour response and 48-hour repair commitments. Extended warranty pricing available below industry averages.

Quantifiable outcome

• Unweighting of up to 80% body weight (from 100% to 20%) in 1% increments
• +3 more outcomes

Named customers21 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Four partnerships are on record, tiered notable and core.

• San Diego Wave FCnotableStrategic or Co-development Partner · 24 January 2023San Diego Wave FC (NWSL professional women's soccer team) announced a multi-year partnership with AlterG for athlete rehabilitation and training support.
• Soreha China (北京欧培德科技有限公司)coreChannel Partner/ Reseller/ Distributor · 1 February 2019Exclusive partnership for China, Hong Kong, and Macau. Soreha China became the sole authorized distributor for AlterG products in these regions as of February 1, 2019, replacing the prior distributor Pukang. Unauthorized sales by other companies are not covered by AlterG or Soreha China warranty or service packages.
• International Distributor Network (40+ countries)coreChannel Partner/ Reseller/ DistributorAlterG products are available worldwide through a network of authorized distributors covering over 40 countries including Australia (Rehab Technology), Germany (Lifeward GmbH), France (Medimex), Italy (A Circle S.P.A.), India (Abhinav Futuristics), UK, Brazil (Delumil SA), Korea (SNS), Japan, and many others.
• Sanford HealthnotableStrategic or Co-development PartnerSanford Sports Performance and Good Samaritan locations use the AlterG anti-gravity treadmill in their rehabilitation programs at facilities in Sioux Falls, South Dakota; Fargo and Grand Forks, North Dakota; and Fort Collins, Colorado.

Scale indicators10 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Boost Treadmills: Closest direct competitor offering the Boost 3 microgravity treadmill with NASA-derived technology at $22,999-$24,999 (or $499-$599/month rental). AlterG filed a 2018 federal patent infringement, trade secret, and unfair competition lawsuit against Boost, Inc., making them the most direct functional substitute.
• h/p/cosmos: German manufacturer of medical and sports treadmills with specialized gait analysis and rehabilitation models. Competes directly with AlterG in clinical and sports-medicine treadmill sales across Europe and globally.
• Woodway: Premium slat-belt and curved treadmill manufacturer whose commercial-grade treadmill technology is integrated into the AlterG PRO series. Competes with AlterG in professional sports performance, clinical rehab, and military training facility treadmill sales.

Broad incumbents

• Biodex Medical Systems: Established rehabilitation and medical equipment manufacturer with a broad portfolio including treadmills, balance systems, and physical therapy/occupational therapy devices. Competes with AlterG in hospital and outpatient rehab procurement but does not specialize in anti-gravity unweighting.
• Life Fitness: Global incumbent in commercial cardio, strength, and group training equipment. Competes with AlterG at the broad commercial-fitness buyer level but does not have a precision air-pressure unweighting product comparable to the Anti-Gravity Treadmill.
• Technogym: Premium commercial fitness equipment manufacturer with a broad connected fitness portfolio including treadmills. Sells into the same high-end sports and wellness facilities as AlterG but without a dedicated anti-gravity unweighting solution.
• Cybex International (Life Fitness): Broad commercial fitness and rehabilitation equipment maker under Life Fitness. Competes with AlterG in strength and cardio equipment sales to sports performance and rehab facilities but lacks a true anti-gravity offering.

Emerging players

• Reha Technology: Swiss maker of robotic gait therapy devices such as the Lokomat. Partial overlap with AlterG in advanced gait rehabilitation; serves hospitals and rehab centers but uses robotic exoskeleton suspension rather than air-pressure unweighting.
• BTE Technologies: Rehabilitation and physical therapy equipment maker specializing in objective functional testing and exercise devices. Competes with AlterG for clinical rehab budgets but focuses on strengthening and evaluation rather than anti-gravity treadmill unweighting.

Others

• Bioness: Neuromodulation and rehabilitation device company (FES systems, gait-related wearables). Complementary rather than competitive with AlterG; both are part of the broader neurorehabilitation toolkit sold by Lifeward and similar rehab specialists.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/alterg
• Xx.com/Alter_G
• Facebookfacebook.com/AlterGInc

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds9 records

Investors10 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about AlterG