Effect of knee joint motion for the transfemoral prosthesis in swimming
The objective of this study was to investigate the effect of knee joint motion on swimming performance for a transfemoral prosthesis in swimming. A flat spring at the knee joint was introduced into a prosthesis which had already been developed, in order to enable the knee joint to move according to...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2015-09-01
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| Series: | Journal of Biomechanical Science and Engineering |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jbse/10/3/10_15-00375/_pdf/-char/en |
| _version_ | 1828781822496997376 |
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| author | Motomu NAKASHIMA Ayako ONO Takashi NAKAMURA |
| author_facet | Motomu NAKASHIMA Ayako ONO Takashi NAKAMURA |
| author_sort | Motomu NAKASHIMA |
| collection | DOAJ |
| description | The objective of this study was to investigate the effect of knee joint motion on swimming performance for a transfemoral prosthesis in swimming. A flat spring at the knee joint was introduced into a prosthesis which had already been developed, in order to enable the knee joint to move according to the fluid force acting on the lower limb. A swimming experiment, in which a subject using the prosthesis swam in a pool, was conducted. Five types of flat spring for the knee joint were prepared for the experiment. From the experiment, it was found that there was a proper stiffness of the flat spring from which the subject felt comfortable during swimming. Next, simulations for the flutter kick and crawl stroke were conducted. The validity of the simulation method was confirmed since the simulated joint angles in the simulation of the flutter kick were sufficiently consistent with the experimental ones in respect to the amplitudes and phases for both the knee and ankle. During the simulation of the crawl stroke, it was found that the amplitude of the hip joint torque on the prosthetic leg compared to the healthy leg increased according to the increase in the stiffness of the knee joint. Since this amount was considered to directly correspond with the ‘reaction during kick' in the VAS evaluation of the experiment, in which the subject evaluated the stiffer knee flat spring as ‘heavier', the consistency of the tendencies between the simulation and experiment was confirmed. From the simulation results, it was also suggested that the subject in the experiment preferred stiffness at the knee joint which minimized the difference between the amplitude of the hip joint torque on the healthy leg and that on the prosthetic leg. |
| first_indexed | 2024-12-11T17:39:27Z |
| format | Article |
| id | doaj.art-66a2ccb61fe640d484fa47f43b096c2b |
| institution | Directory Open Access Journal |
| issn | 1880-9863 |
| language | English |
| last_indexed | 2024-12-11T17:39:27Z |
| publishDate | 2015-09-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Biomechanical Science and Engineering |
| spelling | doaj.art-66a2ccb61fe640d484fa47f43b096c2b2022-12-22T00:56:34ZengThe Japan Society of Mechanical EngineersJournal of Biomechanical Science and Engineering1880-98632015-09-0110315-0037515-0037510.1299/jbse.15-00375jbseEffect of knee joint motion for the transfemoral prosthesis in swimmingMotomu NAKASHIMA0Ayako ONO1Takashi NAKAMURA2Graduate School of Information Science and Engineering, Tokyo Institute of TechnologyGraduate School of Science and Engineering, Tokyo Institute of TechnologyResearch Institute, National Rehabilitation Center for Persons with DisabilitiesThe objective of this study was to investigate the effect of knee joint motion on swimming performance for a transfemoral prosthesis in swimming. A flat spring at the knee joint was introduced into a prosthesis which had already been developed, in order to enable the knee joint to move according to the fluid force acting on the lower limb. A swimming experiment, in which a subject using the prosthesis swam in a pool, was conducted. Five types of flat spring for the knee joint were prepared for the experiment. From the experiment, it was found that there was a proper stiffness of the flat spring from which the subject felt comfortable during swimming. Next, simulations for the flutter kick and crawl stroke were conducted. The validity of the simulation method was confirmed since the simulated joint angles in the simulation of the flutter kick were sufficiently consistent with the experimental ones in respect to the amplitudes and phases for both the knee and ankle. During the simulation of the crawl stroke, it was found that the amplitude of the hip joint torque on the prosthetic leg compared to the healthy leg increased according to the increase in the stiffness of the knee joint. Since this amount was considered to directly correspond with the ‘reaction during kick' in the VAS evaluation of the experiment, in which the subject evaluated the stiffer knee flat spring as ‘heavier', the consistency of the tendencies between the simulation and experiment was confirmed. From the simulation results, it was also suggested that the subject in the experiment preferred stiffness at the knee joint which minimized the difference between the amplitude of the hip joint torque on the healthy leg and that on the prosthetic leg.https://www.jstage.jst.go.jp/article/jbse/10/3/10_15-00375/_pdf/-char/enswimmingprosthesiswelfare engineeringsports engineeringbiomechanics |
| spellingShingle | Motomu NAKASHIMA Ayako ONO Takashi NAKAMURA Effect of knee joint motion for the transfemoral prosthesis in swimming Journal of Biomechanical Science and Engineering swimming prosthesis welfare engineering sports engineering biomechanics |
| title | Effect of knee joint motion for the transfemoral prosthesis in swimming |
| title_full | Effect of knee joint motion for the transfemoral prosthesis in swimming |
| title_fullStr | Effect of knee joint motion for the transfemoral prosthesis in swimming |
| title_full_unstemmed | Effect of knee joint motion for the transfemoral prosthesis in swimming |
| title_short | Effect of knee joint motion for the transfemoral prosthesis in swimming |
| title_sort | effect of knee joint motion for the transfemoral prosthesis in swimming |
| topic | swimming prosthesis welfare engineering sports engineering biomechanics |
| url | https://www.jstage.jst.go.jp/article/jbse/10/3/10_15-00375/_pdf/-char/en |
| work_keys_str_mv | AT motomunakashima effectofkneejointmotionforthetransfemoralprosthesisinswimming AT ayakoono effectofkneejointmotionforthetransfemoralprosthesisinswimming AT takashinakamura effectofkneejointmotionforthetransfemoralprosthesisinswimming |