Mobile Arm Support (MAS): What It Is, How It Works, and Who Benefits

Recovering upper limb function after injury, surgery, or neurological conditions can be challenging, especially for individuals with weakness, fatigue, or limited motor control. The Saebo Mobile Arm Support (MAS) provides mechanical assistance that partially or fully supports the arm’s weight, enabling smoother, more controlled movement and reducing the effort required to perform daily activities and therapeutic exercises. By decreasing fatigue and joint strain, the MAS encourages active engagement, which is essential for effective rehabilitation. 

Saebo offers the MAS in two configurations: the full-size wheeled system, ideal for clinical settings or flexible therapy sessions, and the compact mountable Mini, perfect for home or wheelchair use. Both versions allow adjustable support levels, customizable forearm rests, and articulating arms to match each user’s strength and needs. Whether practicing functional tasks, performing exercises, or regaining independence, the MAS helps bridge the gap between limited arm function and meaningful participation in daily life.

What is the Saebo Mobile Arm Support (MAS)

The Saebo Mobile Arm Support (MAS) is a mechanical, gravity-compensating device designed to assist individuals with limited upper extremity strength or motor control. By partially supporting the weight of the arm, the MAS enables active movement with less effort, helping users more easily participate in therapeutic exercise and functional activities.

The system uses a spring-loaded tension mechanism to reduce the effects of gravity, allowing smoother, more controlled movement throughout the user’s available range of motion. This support helps minimize fatigue and joint stress while encouraging active engagement rather than passive movement, a key component of effective rehabilitation.

Saebo offers the MAS in two configurations to accommodate different environments and needs:

• Saebo MAS (Full Size)
  The full-size MAS features a mobile, wheeled base, making it easy to reposition during therapy sessions or daily activities. This version is well suited for clinical settings or home use when flexibility and frequent repositioning are needed.
• SaeboMAS Mini
  The SaeboMAS Mini is a compact, mountable option that attaches to wheelchairs, tables, or other fixed surfaces. Its smaller footprint makes it ideal for home, community, or space-limited environments while still providing effective gravity compensation.

Both versions include adjustable mounting options, articulating arms, and customizable forearm supports, allowing assistance levels to be matched to the user’s strength and gradually reduced as function improves. In addition to supporting rehabilitation, the Saebo MAS can assist with daily activities such as eating, computer use, writing, and grooming, helping bridge the gap between physical limitations and greater independence.

Adjustability and Individualization 

The Saebo MAS is designed to meet the unique needs of each user through a variety of adjustable features. Both the full-size and Mini versions offer height-adjustable mounts, articulating arms, and customizable forearm supports, allowing the device to accommodate different body sizes, postures, and functional goals. Assistance levels can be tailored to match the user’s current strength and gradually reduced as motor control and endurance improve. 

Customizable forearm attachments provide both comfort and proper alignment, helping reduce compensatory movements and improve movement quality during therapy and functional tasks. These attachments allow clinicians to limit motion to specific planes, such as shoulder flexion, extension, and horizontal movement, while also selectively unlocking internal and external rotation or controlling forearm supination and pronation. Additional supports are available for the elbow or hand to assist patients with limited motion, muscle flaccidity, or contractures. This level of individualization ensures that users can safely and effectively participate in exercises, functional tasks, and task-specific training, making the MAS a versatile tool for long-term rehabilitation and the restoration of independence.

Who Benefits from Arm Supports?

Arm supports can benefit a wide range of individuals who experience upper extremity weakness, limited mobility, pain, or reduced endurance. By reducing the effects of gravity, these devices help users actively engage in movement, therapy, and daily activities, supporting both functional recovery and independence across many populations.

Neurologic Conditions: Hemiparesis, Hemiplegia, Brian Injuries & More

Individuals recovering from stroke, traumatic brain injury (TBI), or spinal cord injury (SCI) often experience weakness or paralysis on one or both sides of the body. Mobile arm supports help reduce the impact of gravity, enabling users to initiate and practice arm movements that may otherwise be difficult.

People with cerebral palsy, multiple sclerosis, Parkinson’s disease, and other neurological conditions may also benefit from the controlled assistance these devices provide, allowing for improved movement quality, increased repetition, and greater participation in functional tasks.

Orthopedic Conditions: Shoulder Impingements, Rotator Cuff, Frozen Shoulder

Individuals with shoulder pain, post-surgical weakness, or limited range of motion often benefit from arm supports that allow movement with less joint stress and discomfort. This includes those recovering from rotator cuff repair, managing shoulder impingement, or experiencing adhesive capsulitis. By partially supporting the arm, mobile arm supports help users perform therapeutic exercises and daily activities while promoting safe, active movement.

Neuromuscular & Peripheral Nerve Conditions

Conditions such as muscular dystrophy, amyotrophic lateral sclerosis (ALS), and peripheral nerve injuries can lead to progressive or prolonged upper extremity weakness. In these cases, mobile arm supports serve as valuable tools for functional assistance and energy conservation, helping individuals maintain independence in activities such as self-feeding, computer use, and personal care.

Functional Age-Related Conditions

Age-related muscle weakness, deconditioning, or prolonged illness can make everyday arm movements more challenging. Mobile arm supports help older adults with general weakness continue to perform activities of daily living, such as eating and grooming, while encouraging active participation. This support can play an important role in maintaining independence, confidence, and quality of life.

How the MAS Supports Recovery

Mobile arm support devices help patients recover through several mechanisms that enhance rehabilitation for those with upper limb weakness or limited motor control. Consistent use of the MAS, whether the full-size wheeled system or the compact mountable Mini, can improve movement quality, function, and independence.

Repetition and Neuroplasticity

The MAS enables patients to perform repetitive, controlled movements that might otherwise be impossible. Due to fatigue, many patients are unable to complete the required repetitions to maximize the brain’s ability to rewire. The repetition the MAS allows promotes neuroplastic changes, allowing the brain to rewire itself and strengthen neural pathways. Even patients with minimal voluntary movement can benefit, gradually regaining functional control.

• Full-size MAS: Ideal for therapy sessions requiring longer practice or multiple repetitions with ease of repositioning.
• Mini MAS: Perfect for daily at-home use, enabling consistent practice in a familiar environment.

Task-Specific Training

MAS devices support real-life, functional activities instead of generic exercises. Practicing tasks in their natural context, such as reaching, grasping, or manipulating objects, helps the brain generalize movements to daily life, making rehabilitation more meaningful and effective.

Gravity Elimination or Reduction

By partially counterbalancing the arm’s weight, the MAS allows patients with muscle grades as low as 2/5 to perform purposeful movements they could not manage otherwise. Reducing the effects of gravity also decreases fatigue, letting patients practice longer and more efficiently.

• Full-size MAS: Supports extended therapy sessions and multi-user clinical environments.
• Mini MAS: Provides gravity assistance for home or wheelchair use, maintaining functional practice outside the clinic.

Functional Task Practice

The MAS transforms therapy exercises into practical skills. Patients can safely practice activities such as eating, writing, using a computer, or self-care tasks, building confidence and independence while reinforcing motor learning.

Reducing Joint Stress and Improving Stability

Supporting the arm’s weight prevents compensatory movements and joint strain that could lead to pain or secondary injuries. The MAS promotes safe, efficient movement patterns, allowing patients to recover more quickly and with less risk of setbacks. Both the full-size and Mini systems help maintain proper alignment and stability during exercises and functional tasks.

Conclusion

Regaining upper limb function can be a long and challenging journey, particularly for individuals with weakness, fatigue, or limited motor control following injury, surgery, or neurological conditions. The Saebo Mobile Arm Support (MAS) provides targeted, gravity-minimizing assistance that helps patients move their arms more easily, safely, and effectively. By supporting the weight of the arm, reducing fatigue, and promoting proper alignment, the MAS allows users to engage in repetitive exercises, functional tasks, and task-specific training, all critical components for recovery and neuroplasticity.

Whether using the full-size wheeled MAS in a clinical or home setting, or the compact mountable Mini for wheelchair or table-based support, patients benefit from a device that can be fully customized to their size, strength, and functional needs. Adjustable forearm rests, articulating arms, and additional supports for the elbow or hand help maintain proper alignment, reduce compensatory movements, and improve movement quality.

Across neurological, orthopedic, neuromuscular, and age-related conditions, the MAS empowers users to perform everyday activities such as eating, writing, computer use, and self-care with greater independence. By combining individualized support, functional practice, and safe movement, the Saebo MAS bridges the gap between limited arm function and meaningful participation in daily life, making it a versatile and essential tool for long-term rehabilitation and improved quality of life.