Optimizing Simulation of the Arm Stroke in Crawl Swimming Considering Muscle Strength Characteristics of Athlete Swimmers
In this study, the optimal arm strokes in crawl swimming which maximize the swimming speed and propulsive efficiency were solved computationally. For this objective, an optimizing method which consisted of the random search and the PSO (Particle Swarm Optimization) algorithm was constructed. In orde...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2012-03-01
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| Series: | Journal of Biomechanical Science and Engineering |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jbse/7/2/7_2_102/_pdf/-char/en |
| _version_ | 1811225655822516224 |
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| author | Motomu NAKASHIMA Shun MAEDA Takahiro MIWA Hiroshi ICHIKAWA |
| author_facet | Motomu NAKASHIMA Shun MAEDA Takahiro MIWA Hiroshi ICHIKAWA |
| author_sort | Motomu NAKASHIMA |
| collection | DOAJ |
| description | In this study, the optimal arm strokes in crawl swimming which maximize the swimming speed and propulsive efficiency were solved computationally. For this objective, an optimizing method which consisted of the random search and the PSO (Particle Swarm Optimization) algorithm was constructed. In order to consider the muscle strength characteristics of the swimmer as the constraint condition of the optimization, an experiment to measure the maximum joint torques was carried out for various joint angles and angular speeds. Using the measured experimental data as the reference values, a musculoskeletal simulation model was constructed. By the constructed musculoskeletal model, muscle strength characteristics in various conditions were investigated and used to create a database. Using this database, the optimizing calculation was finally conducted and the following results were obtained: In the optimization maximizing the swimming speed, the swimming speed became maximum when the stroke cycle was 0.9 s. A relatively I-shaped stroke was obtained in this case. In the optimization maximizing the propulsive efficiency, the propulsive efficiency became maximum when the stroke cycle was 1.3 s. A relatively S-shaped stroke was obtained in this case. Two strokes which respectively maximized the swimming speed and propulsive efficiency were very similar to each other when the stroke cycles were the same. The swimming speeds and stroke cycles obtained in the optimizing calculation were within reasonable ranges compared to the actual races. |
| first_indexed | 2024-04-12T09:11:03Z |
| format | Article |
| id | doaj.art-01532b0ca3c34a7f9766b81dc539b05f |
| institution | Directory Open Access Journal |
| issn | 1880-9863 |
| language | English |
| last_indexed | 2024-04-12T09:11:03Z |
| publishDate | 2012-03-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Biomechanical Science and Engineering |
| spelling | doaj.art-01532b0ca3c34a7f9766b81dc539b05f2022-12-22T03:38:58ZengThe Japan Society of Mechanical EngineersJournal of Biomechanical Science and Engineering1880-98632012-03-017210211710.1299/jbse.7.102jbseOptimizing Simulation of the Arm Stroke in Crawl Swimming Considering Muscle Strength Characteristics of Athlete SwimmersMotomu NAKASHIMA0Shun MAEDA1Takahiro MIWA2Hiroshi ICHIKAWA3Graduate School of Science and Engineering, Tokyo Institute of TechnologyGraduate School of Information Science and Engineering, Tokyo Institute of TechnologyJapan Institute of Sports SciencesFaculty of Sports and Health Science, Fukuoka UniversityIn this study, the optimal arm strokes in crawl swimming which maximize the swimming speed and propulsive efficiency were solved computationally. For this objective, an optimizing method which consisted of the random search and the PSO (Particle Swarm Optimization) algorithm was constructed. In order to consider the muscle strength characteristics of the swimmer as the constraint condition of the optimization, an experiment to measure the maximum joint torques was carried out for various joint angles and angular speeds. Using the measured experimental data as the reference values, a musculoskeletal simulation model was constructed. By the constructed musculoskeletal model, muscle strength characteristics in various conditions were investigated and used to create a database. Using this database, the optimizing calculation was finally conducted and the following results were obtained: In the optimization maximizing the swimming speed, the swimming speed became maximum when the stroke cycle was 0.9 s. A relatively I-shaped stroke was obtained in this case. In the optimization maximizing the propulsive efficiency, the propulsive efficiency became maximum when the stroke cycle was 1.3 s. A relatively S-shaped stroke was obtained in this case. Two strokes which respectively maximized the swimming speed and propulsive efficiency were very similar to each other when the stroke cycles were the same. The swimming speeds and stroke cycles obtained in the optimizing calculation were within reasonable ranges compared to the actual races.https://www.jstage.jst.go.jp/article/jbse/7/2/7_2_102/_pdf/-char/enswimmingsports biomechanicsbiofluid dynamicsoptimizationsimulation |
| spellingShingle | Motomu NAKASHIMA Shun MAEDA Takahiro MIWA Hiroshi ICHIKAWA Optimizing Simulation of the Arm Stroke in Crawl Swimming Considering Muscle Strength Characteristics of Athlete Swimmers Journal of Biomechanical Science and Engineering swimming sports biomechanics biofluid dynamics optimization simulation |
| title | Optimizing Simulation of the Arm Stroke in Crawl Swimming Considering Muscle Strength Characteristics of Athlete Swimmers |
| title_full | Optimizing Simulation of the Arm Stroke in Crawl Swimming Considering Muscle Strength Characteristics of Athlete Swimmers |
| title_fullStr | Optimizing Simulation of the Arm Stroke in Crawl Swimming Considering Muscle Strength Characteristics of Athlete Swimmers |
| title_full_unstemmed | Optimizing Simulation of the Arm Stroke in Crawl Swimming Considering Muscle Strength Characteristics of Athlete Swimmers |
| title_short | Optimizing Simulation of the Arm Stroke in Crawl Swimming Considering Muscle Strength Characteristics of Athlete Swimmers |
| title_sort | optimizing simulation of the arm stroke in crawl swimming considering muscle strength characteristics of athlete swimmers |
| topic | swimming sports biomechanics biofluid dynamics optimization simulation |
| url | https://www.jstage.jst.go.jp/article/jbse/7/2/7_2_102/_pdf/-char/en |
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