Faculty Advisor

Troy, Karen


Individuals experiencing diminished leg strength often encounter difficulty performing the transition from a sitting to a standing position. An adult will complete an average of sixty transitions per day, making it one of the most physically demanding tasks performed in day-to-day life. The elderly population of the USA increased by 7% in fifty years, and thus the number of persons lacking the ability to successfully complete the Sit to Stand Transition (STST) has also been increasing. This project designed a portable mechanism that can be mounted on an individual’s leg to provide an assistive knee extension moment during the STST. The final design is a spring-driven ratchet and cam system that stores the potential energy expended during sitting for usage during the STST.


Worcester Polytechnic Institute

Date Accepted

May 2017


Mechanical Engineering

Project Type

Major Qualifying Project



Advisor Department

Biomedical Engineering

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