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- Publisher Website: 10.1016/j.eng.2018.07.011
- Scopus: eid_2-s2.0-85050876822
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Article: Unpowered Knee Exoskeleton Reduces Quadriceps Activity during Cycling
Title | Unpowered Knee Exoskeleton Reduces Quadriceps Activity during Cycling |
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Authors | |
Keywords | Knee Orthosis Muscle activity Energy cost Cycling Electromyography Augmentation Exoskeleton |
Issue Date | 2018 |
Citation | Engineering, 2018, v. 4, n. 4, p. 471-478 How to Cite? |
Abstract | Cycling is an eco-friendly method of transport and recreation. With the intent of reducing the energy cost of cycling without providing an additional energy source, we have proposed the use of a torsion spring for knee-extension support. We developed an exoskeleton prototype using a crossing four-bar mechanism as a knee joint with an embedded torsion spring. This study evaluates the passive knee exoskeleton using constant-power cycling tests performed by eight healthy male participants. We recorded the surface electromyography over the rectus femoris muscles of both legs, while the participants cycled at 200 and 225 W on a trainer with the developed wheel-accelerating system. We then analyzed these data in time–frequency via a continuous wavelet transform. At the same cycling speed and leg cadence, the median power spectral frequency of the electromyography increases with cycling load. At the same cycling load, the median power spectral frequency decreases when cycling with the exoskeleton. Quadriceps activity can be relieved despite the exoskeleton consuming no electrical energy and not delivering net-positive mechanical work. This fundamental can be applied to the further development of wearable devices for cycling assistance. |
Persistent Identifier | http://hdl.handle.net/10722/302997 |
ISSN | 2023 Impact Factor: 10.1 2023 SCImago Journal Rankings: 1.646 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Chaichaowarat, Ronnapee | - |
dc.contributor.author | Kinugawa, Jun | - |
dc.contributor.author | Kosuge, Kazuhiro | - |
dc.date.accessioned | 2021-09-07T08:43:00Z | - |
dc.date.available | 2021-09-07T08:43:00Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | Engineering, 2018, v. 4, n. 4, p. 471-478 | - |
dc.identifier.issn | 2095-8099 | - |
dc.identifier.uri | http://hdl.handle.net/10722/302997 | - |
dc.description.abstract | Cycling is an eco-friendly method of transport and recreation. With the intent of reducing the energy cost of cycling without providing an additional energy source, we have proposed the use of a torsion spring for knee-extension support. We developed an exoskeleton prototype using a crossing four-bar mechanism as a knee joint with an embedded torsion spring. This study evaluates the passive knee exoskeleton using constant-power cycling tests performed by eight healthy male participants. We recorded the surface electromyography over the rectus femoris muscles of both legs, while the participants cycled at 200 and 225 W on a trainer with the developed wheel-accelerating system. We then analyzed these data in time–frequency via a continuous wavelet transform. At the same cycling speed and leg cadence, the median power spectral frequency of the electromyography increases with cycling load. At the same cycling load, the median power spectral frequency decreases when cycling with the exoskeleton. Quadriceps activity can be relieved despite the exoskeleton consuming no electrical energy and not delivering net-positive mechanical work. This fundamental can be applied to the further development of wearable devices for cycling assistance. | - |
dc.language | eng | - |
dc.relation.ispartof | Engineering | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | Knee | - |
dc.subject | Orthosis | - |
dc.subject | Muscle activity | - |
dc.subject | Energy cost | - |
dc.subject | Cycling | - |
dc.subject | Electromyography | - |
dc.subject | Augmentation | - |
dc.subject | Exoskeleton | - |
dc.title | Unpowered Knee Exoskeleton Reduces Quadriceps Activity during Cycling | - |
dc.type | Article | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1016/j.eng.2018.07.011 | - |
dc.identifier.scopus | eid_2-s2.0-85050876822 | - |
dc.identifier.volume | 4 | - |
dc.identifier.issue | 4 | - |
dc.identifier.spage | 471 | - |
dc.identifier.epage | 478 | - |
dc.identifier.isi | WOS:000443042100011 | - |