Implementation of Cycle-to-Cycle Control with Energy Storage Element for FES-Assisted Elliptical Stepping Exercise

Yahaya, Saiful Zaimy; Hussain, Z.; Boudville, R.; Ahmad, Fadzil; Taib, Mohd Nasir

doi:10.1109/icsengt.2018.8606384

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…There were efforts in the study of passive knee orthoses in other rehabilitation exercises, e.g., in rowing [11] and elliptical stepping [12]. Both works [11], [12] simulated passive knee orthoses with springs storing energy during knee extension and then releasing energy during flexion. The results showed that the addition of the passive element reduced the overall level of quadriceps excitation.…”

Section: A Related Workmentioning

confidence: 99%

Passive Knee Orthoses Assistance in Functional Electrical Stimulation Cycling in an Individual With Spinal Cord Injury

Sousa

Baptista

et al. 2021

IEEE Trans. Neural Syst. Rehabil. Eng.

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Functional Electrical Stimulation (FES) may be used in rehabilitation and assistance of people with Spinal Cord Injury (SCI). One significant application is facilitating physical exercise, mainly when combining FES with mechanical platforms, such as tricycles. However, there are still technical challenges in FES cycling protocols, such as improving control and improving cycling performance. Here we show how passive elements in knee orthoses during FES cycling could increase the average cadence, taking advantage of the cycling movement. Our approach is twofold. First, we simulated the forward dynamics of a detailed musculoskeletal model with passive elements over the knees. Simulations showed that specific spring stiffness ranges increased the crankset speed during cycling by more than 50%. Using parameters found in simulations, we built a pair of passive orthoses and performed experiments with one individual with SCI. During two days, the volunteer cycled with similar stimulation magnitude with and without the passive elements. We observed that the average crankset speed was higher by more than 10% when the springs were attached to the passive orthoses. These results show the potential of using passive elements to increase cycling speed for FES cycling with similar or even lower stimulation magnitude, leading to longer exercise duration.

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