The University of Central Florida invention is a Variable Resistance Suit (VARS) designed to provide speed-dependent, bi-directional, and variable resistance at a single joint. Muscle disorders and induced muscle atrophy impose critical risks to the well-being of an individual, limiting normal activities of daily living. Several resistance training methods exist that have effectively reversed the progression of muscle atrophy. Weightlifting and hydrotherapy are the two widely practiced schemes for resistance training; however, there is the potential risk of excessive loads exerted on the muscles during weightlifting, and limited accessibility and cost are barriers of hydrotherapy. An alternative is using a resistance band. Some limitations include engaging multiple muscles/joints while only unidirectional resistance is feasible.

The UCF invention addresses these limitations, and pilot study results supported the efficacy of VARS as evidenced by the changes in flexor and extensor muscle activations in response to eight different levels of resistance modulated by VARS. Based on this result, VARS could be a viable solution and complementary to existing tools and techniques used in resistance training.

Stage of Development

Prototype available.

Benefit

Safe

Activates flexor and extensor muscles

Provides different levels of resistance at a targeted joint via simple, manual adjustments

Market Application

Rehabilitation and physical therapy

Work Sharing Device Assists with Lower Limb Mobility

Abstract

The University of Central Florida invention is a Work-sharing of Upper Lower Limbs (WULL) device that creates external mechanical pathways to transfer upper limb joint motion or force to the lower limb joints. Mobility assistive devices, such as canes, crutches or walkers, are used to aid in the mobility of those affected by a lower limb impairment or disability. Although proven effective, the main shortcoming of these devices is the underutilization of lower limb muscles, which can decrease muscle mass and function of the lower limbs. Powered wearable devices for mobility assistance, such as exoskeletons or exosuits, have been developed and evolved over the past few decades; however, they are expensive, bulky, heavy, and power-demanding. This invention uses a new approach to assist lower limb motions using upper limb muscles, providing a self-regulated and self-powered means to assist lower limbs during ambulatory movements using upper limb muscles.

Stage of Development

Prototype available.