4.3 Article

Tibiofemoral forces during FES rowing in individuals with spinal cord injury

出版社

TAYLOR & FRANCIS LTD
DOI: 10.1080/10255842.2020.1821880

关键词

Tibiofemoral force; FES rowing; spinal cord injury; musculoskeletal modelling; functional electrical stimulation

资金

  1. United States Department of Veterans Affairs, Rehabilitation Research and Development Service [I21 RX001410]

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This study aimed to determine tibiofemoral forces during FES rowing in individuals with SCI. Peak magnitudes of tibiofemoral forces, relationships with FRFs and handle forces, and ratios of peak magnitudes to FRFs and handle forces were analyzed, providing a foundation for developing a direct exercise intensity metric for bone mechanical stimulus and personalizing rehabilitation protocols for bone health in SCI patients.
The purpose of this study is to determine the tibiofemoral forces during functional electrical stimulation (FES) rowing in individuals with spinal cord injury (SCI). We analysed the motion of five participants with SCI during FES rowing, with simultaneous measurements of (i) three-dimensional marker trajectories, (ii) foot reaction forces (FRFs), (iii) ergometer handle forces, and (iv) timestamps for electrical stimulation of the quadriceps and hamstrings muscles. We created full-body musculoskeletal models in OpenSim to determine subject-specific tibiofemoral forces during FES rowing. The peak magnitudes of tibiofemoral forces averaged over five participants with SCI were 2.43 +/- 0.39 BW and 2.25 +/- 0.71 BW for the left and right legs, respectively. The peak magnitudes of FRFs were 0.19 +/- 0.04 BW in each leg. The peak magnitude of handle forces was 0.47 +/- 0.19 BW. Peak tibiofemoral force was associated with peak FRF (magnitudes, R-2= 0.56, p = 0.013) and peak handle force (magnitudes, R-2= 0.54, p = 0.016). The ratios of peak magnitude of tibiofemoral force to peak magnitude of FRF were 12.9 +/- 1.9 (left) and 11.6 +/- 2.4 (right), and to peak magnitude of handle force were 5.7 +/- 2.3 (left) and 4.9 +/- 0.9 (right). This work lays the foundation for developing a direct exercise intensity metric for bone mechanical stimulus at the knee during rehabilitation exercises. Clinical Significance: Knowledge of tibiofemoral forces from exercises such as FES rowing may provide clinicians the ability to personalize rehabilitation protocols to ensure that an SCI patient is receiving the minimum dose of mechanical stimulus necessary to maintain bone health.

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