TY - GEN
T1 - Passive Knee Assistance Affects Whole-Body Biomechanics during Sit-to-Stand
AU - Seko, Sarah
AU - Matthew, Robert P.
AU - Riemer, Raziel
AU - Bajcsy, Ruzena
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/7/1
Y1 - 2019/7/1
N2 - The sit-to-stand (STS) motion is an activity of daily living which requires significant torque generation and coordinated movement at multiple joints. It is therefore important to consider the whole-body biomechanics when designing an assistive device for STS. In this study, a passive elastic orthotic was developed which provides bilateral knee extension assistance. Initial human experiments were conducted with two subjects under two foot-placement conditions. The human and device kinematics and dynamics were modelled, allowing for the assessment of the biomechanical effects of the device. The assistance resulted in a decrease in the human knee torque as well as changes in whole-body biomechanics, notably an increase in the linear momentum of the upper body and a decrease in the anterior excursion of the center of mass. These results indicate that single-joint assistance at the knee has the potential to both facilitate successful STS and positively alter whole-body biomechanics.
AB - The sit-to-stand (STS) motion is an activity of daily living which requires significant torque generation and coordinated movement at multiple joints. It is therefore important to consider the whole-body biomechanics when designing an assistive device for STS. In this study, a passive elastic orthotic was developed which provides bilateral knee extension assistance. Initial human experiments were conducted with two subjects under two foot-placement conditions. The human and device kinematics and dynamics were modelled, allowing for the assessment of the biomechanical effects of the device. The assistance resulted in a decrease in the human knee torque as well as changes in whole-body biomechanics, notably an increase in the linear momentum of the upper body and a decrease in the anterior excursion of the center of mass. These results indicate that single-joint assistance at the knee has the potential to both facilitate successful STS and positively alter whole-body biomechanics.
UR - http://www.scopus.com/inward/record.url?scp=85077889933&partnerID=8YFLogxK
U2 - 10.1109/EMBC.2019.8856477
DO - 10.1109/EMBC.2019.8856477
M3 - Conference contribution
C2 - 31946851
AN - SCOPUS:85077889933
T3 - Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
SP - 4440
EP - 4444
BT - 2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2019
PB - Institute of Electrical and Electronics Engineers
T2 - 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2019
Y2 - 23 July 2019 through 27 July 2019
ER -