The Aligned As Designed Wheelchair: Advancing Mobility Through Innovative Design
The AAD Wheelchair’s Patented design US Patent no 12,257,196 addresses complex challenges faced by wheelchair users. By promoting improved muscular skeletal system alignment, coordinated movement of all four limbs and mitigating health risks associated with immobility, the AAD Wheelchair offers a transformative solution for enhanced independence, activity, and well-being.
The Aligned As Designed Wheelchair: Advancing Mobility Through Innovative Design
The AAD Wheelchair represents a significant advancement in mobility solutions for wheelchair users. Suitable for both paraplegic and quadriplegic users with limited or no movement in their legs. Meticulously designed and engineered to foster coordinated movement between the upper and lower limbs through the body’s midline, while promoting healthy spinal alignment and supporting user independence. The AAD wheelchair can be operated manually and mechanically.
Patented Features And Their Transformative Impact
At the core of the AAD Wheelchair’s innovation are its patented features: a unique gearing system that enables users with limited or no movement to generate movement in their lower limbs while keeping the user’s hands contact free with the wheels. A wheelchair seat and back design that supports the natural alignment and curvature of the spine and allows the user’s arms to extend forward and backward behind the body engaging the flexor and extensor muscles around the top of the spine. These features are designed to be transformative for for neural pathway development in individuals with spinal cord injuries (SCI), Stroke, Spina Bifida (SB), Cerebral Palsy (CP), and other conditions affecting mobility. By supporting and promoting contralateral reciprocal movement, maintaining natural alignment of the spine and lower limbs, enhancing upper and lower body mobility, and stimulating muscles, ligaments, tendons, and joints, the AAD Wheelchair empowers users to lead more active and independent lives.
Contralateral Reciprocal Movement Mechanism
When the hand mechanism on one side of the wheelchair is moved, either manually or mechanically the Patented gearing system extends the leg and foot on the opposite side of the body. Contralateral reciprocal movement—where arms and legs move together in a cross-body pattern—is particularly beneficial for users with mobility-limiting conditions. Movement generated from the gearing mechanism stimulates otherwise inactive muscles, ligaments, tendons, and joints, and promotes synaptic strengthening and neural reorganization in the brain.
Enhanced Arm Mobility and Core Engagement
Unlike conventional wheelchairs, the AAD Wheelchair design allows the arms to swing forward and backward behind the body while keeping the head upright, aligned, and centered over the shoulders. The more natural shoulder joint alignment and increased range of motion in the arms protects the shoulder joints from overuse while engaging both flexor and extensor muscle groups around the top of the spine, beneath the shoulder blades and in the chest and abdomen. Such engagement supports upper body strength, flexibility, and overall well-being.
Ergonomic Backrest for Spinal Alignment
The AAD Wheelchair’s backrest is designed to support the natural alignment and curvature of the cervical, thoracic, and lumbar regions of the spine. By providing comprehensive spinal support, the wheelchair helps users maintain an upright, centered head position that reduces spinal and shoulder joint strain. Proper spinal alignment is essential for daily functioning and long-term spinal health.
Ergonomic Seat for Lower Limb Alignment
The contoured seat ensures that knees and ankles remain aligned under the hips, encouraging a healthy, upright seated posture. This alignment also simplifies transfers into and out of the wheelchair, enhancing user autonomy and safety. The seat’s back wings provide additional support for users getting into and out of the wheelchair. For users who can stand, the adjustable backrest builtin standing frame makes it easier to rise from a seated position and stand comfortably behind the wheelchair without needing an additional standing frame.
Weighted Footrests with Protective Toe Guards
The footrests are equipped with toe guards to protect the front of the foot from trauma. The telescoping, height-adjustable, pivoting, and weighted footrest design helps maintain continuous movement of the lower limbs and feet . We believe that clinical studies will show this reduces the risk of Achilles tendon contracture and improves the foot’s ability to maintain or regain plantar and dorsiflexion of the foot. Dorsal and plantar flexion of the foot is essential for standing, walking and proper foot mechanics of the 26 bones, 33 joints and over 100 muscles, ligament and tendons of the foot.
Reduced Mechanical Stress With Traditional Wheelchair Use Impacts Bone Health
Mechanical stress from activities like walking and standing is vital for bone health, stimulating remodeling and growth through weight-bearing and muscle contractions. In wheelchair users, reduced mechanical loading leads to decreased bone density and impaired bone metabolism—a condition known as disuse osteoporosis. This increases fracture risk, slows bone healing, and in children has been shown to stunt bone growth and cause musculoskeletal deformities.
Loss of Coordinated Arm and Leg Movement
Contralateral movement patterns are foundational in early motor development, as seen in crawling and walking. Such activities establish cross-body connections essential for later movement, cognitive function, hand-eye coordination and musculoskeletal health. For wheelchair users with paralysis, or limited movement of their lower limbs, the loss of coordinated arm and leg movement increases the risk of chronic diseases (e.g., obesity, diabetes, cardiovascular disease) and causes muscle tone and joint contractures leading to further complications associated with lower limb immobility.
Muscle and Tendon Changes: Atrophy and Degeneration
Reduced movement leads to muscle atrophy—muscles shrink and lose strength—and tendon degeneration, making them less elastic and more injury-prone. These changes decrease function and raise the risk of contractures (permanent tightening of muscles, tendons, and ligaments), making transfers, independence, and self-care more challenging.
Physical Changes in Paralyzed Limbs
Paralyzed limbs experience muscle wasting, limited joint mobility due to contractures, swelling from poor circulation, and sensory changes. These factors increase the risk of pressure injuries and complicate limb care and hygiene, requiring specialized interventions.
Cellular Mechanisms of Bone Loss
Bone loss in wheelchair users involves an imbalance between osteoclasts (which break down bone tissue) and osteoblasts (which build bone). Reduced mechanical stress increases bone resorption and decreases bone formation, leading to decreased bone mass, structural weakness, and higher fracture risk.
Kinetic Chain Alignment and Contralateral Movement
The kinetic chain is the interconnected system of muscles, ligaments, tendons, bones, and joints. Proper alignment and contralateral reciprocal movement ensure efficient force distribution and injury prevention. Altered movement patterns in wheelchair users can disrupt this alignment, causing compensatory movements that strain the upper body and increase overuse injuries, especially in the shoulders and wrists.
Builtin Standing Frame and the Importance of Weight-Bearing Activities For Wheelchair Users
Weight-bearing activities are essential for maintaining bone density and muscle mass in adults and children that can stand. Without regular standing and load-bearing wheelchair users face accelerated bone loss, muscle weakening, and reduced mobility and independence. By redesigning the back and seat of the AAD Wheelchair to incorporate a builtin standing frame pediatric and adult wheelchair users that can stand will be able to do so without having to purchase additional equipment.
Immobility and Chronic Disease Risk
Prolonged immobility impacts more than muscles and bones; it also affects metabolic health and independence. Reduced physical activity impairs glucose metabolism, increases insulin resistance, and raises the risk of type 2 diabetes and cardiovascular disease. Sedentary lifestyles contribute to weight gain and unfavorable body composition, further limiting mobility and exacerbating health problems.
Aligned As Designed Patented rehabilitation-oriented mobility devices are designed and Patented in United States, Canada and China to help users lead more active and independent lives.