Modulation of Achilles tendon force with load carriage and exosuit assistance
Modulation of Achilles tendon force with load carriage and exosuit assistance
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通过负载运输和外装辅助调节跟腱力
DOI：
10.1126/scirobotics.abq1514
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发表时间：
2022
期刊：
影响因子：
25
通讯作者：
Thelen, Darryl G.
中科院分区：
文献类型：
--
作者：
Schmitz, Dylan G.;Nuckols, Richard W.;Lee, Sangjun;Akbas, Tunc;Swaminathan, Krithika;Walsh, Conor J.;Thelen, Darryl G.
无论是在健康人群中还是在疾病人群中，外衣都具有帮助运动的潜力，但外衣辅助对潜在肌肉-肌腱组织负荷的影响尚不清楚。在这项研究中，我们使用剪切波张力计来表征踝关节负重和外衣辅助对跟腱力量的调节。在负重为体重15%和30%的跑步机上步行(1.25m/S)时，跟腱峰值力量分别增加了11%和23%。与无辅助组相比，辅助组的跟腱峰值力显著降低，尽管不同受试者的变化幅度各不相同。在无人辅助行走的负重情况下，跟腱的峰值力量与踝关节的峰值扭矩显著相关。然而，当应用踝趾屈肌辅助时，最大肌腱力和最大生物踝关节扭矩之间的关系不再显著。使用可穿戴式剪切波张力计测量跟腱的波速，并对一系列辅助负荷曲线进行比较，进行了室外初步研究。肌腱负荷的减少因外形的不同而不同，这突显了在研究和优化外骨骼和外骨骼时，活体测量肌肉和肌腱力量的重要性。
Exosuits have the potential to assist locomotion in both healthy and pathological populations, but the effect of exosuit assistance on the underlying muscle-tendon tissue loading is not yet understood. In this study, we used shear wave tensiometers to characterize the modulation of Achilles tendon force with load carriage and exosuit assistance at the ankle. When walking (1.25 m/s) unassisted on a treadmill with load carriage weights of 15 and 30% of body weight, peak Achilles tendon force increased by 11 and 23%, respectively. Ankle exosuit assistance significantly reduced peak Achilles tendon force relative to unassisted, although the magnitude of change was variable across participants. Peak Achilles tendon force was significantly correlated with peak ankle torque for unassisted walking across load carriage conditions. However, when ankle plantarflexor assistance was applied, the relationship between peak tendon force and peak biological ankle torque was no longer significant. An outdoor pilot study was conducted in which a wearable shear wave tensiometer was used to measure Achilles tendon wave speed and compare across an array of assistance loading profiles. Reductions in tendon loading varied depending on the profile, highlighting the importance of in vivo measurements of muscle and tendon forces when studying and optimizing exoskeletons and exosuits.
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DOI：
10.1109/tnsre.2021.3074154
发表时间：
2021
期刊：
IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society
影响因子：
--
作者：
Song S;Collins SH
通讯作者：
Collins SH
影响因子：
4.6
作者：
Keuler, Emily M.;Loegering, Isaac F.;Thelen, Darryl G.
通讯作者：
Thelen, Darryl G.
影响因子：
1.4
作者：
Buchanan, TS;Lloyd, DG;Besier, TF
通讯作者：
Besier, TF
影响因子：
5.2
作者：
Siviy C;Bae J;Baker L;Porciuncula F;Baker T;Ellis TD;Awad LN;Walsh CJ
通讯作者：
Walsh CJ
影响因子：
5.1
作者：
Fricke, Simone S.;Bayon, Cristina;van Asseldonk, Edwin H. F.
通讯作者：
van Asseldonk, Edwin H. F.