Normalized economical speed is influenced by aging and not by exercise habituation
Abstract Objective A U-shaped relationship between energy cost of walking (C w ) and walking speed indicates that there is a specific speed minimizing the C w , called economical speed (ES). It is mostly slower in older adults than young adults; however, effects of leg length on the ES have been ign...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2023-10-01
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| Series: | BMC Research Notes |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s13104-023-06545-2 |
| _version_ | 1797578407187316736 |
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| author | Masahiro Horiuchi Akira Saito Kiyotaka Motoyama Takehiro Tashiro Daijiro Abe |
| author_facet | Masahiro Horiuchi Akira Saito Kiyotaka Motoyama Takehiro Tashiro Daijiro Abe |
| author_sort | Masahiro Horiuchi |
| collection | DOAJ |
| description | Abstract Objective A U-shaped relationship between energy cost of walking (C w ) and walking speed indicates that there is a specific speed minimizing the C w , called economical speed (ES). It is mostly slower in older adults than young adults; however, effects of leg length on the ES have been ignored. We investigated effects of aging and exercise habituation on the normalized ES by leg length (ESnormalized). We quantified time delay of stride length and step frequency in sedentary young (SY), active young (AY), and active elderly (AE) adults in response to sinusoidal gait speed change at 30-s and 180-s periods with an amplitude of ± 0.56 m･s− 1. Results The ES was significantly slower in the following sequence: AE, SY, and AY, whereas ESnormalized was slower in the AE than in other young groups, with no difference between AY and SY. AE and SY showed greater step variabilities at the 180-s period, whereas AY showed relatively smaller step variabilities at both periods. Collectively, the ESnormalized slowed due to aging, not due to exercise habituation. When optimizing the appropriate SL-SF combination for sinusoidal speed changes, young and elderly adults may adopt different strategies. Exercise habituation may reduce step variabilities in young adults. |
| first_indexed | 2024-03-10T22:21:30Z |
| format | Article |
| id | doaj.art-a11796acce6547e19d22a26ba3cd2c9e |
| institution | Directory Open Access Journal |
| issn | 1756-0500 |
| language | English |
| last_indexed | 2024-03-10T22:21:30Z |
| publishDate | 2023-10-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Research Notes |
| spelling | doaj.art-a11796acce6547e19d22a26ba3cd2c9e2023-11-19T12:16:13ZengBMCBMC Research Notes1756-05002023-10-011611710.1186/s13104-023-06545-2Normalized economical speed is influenced by aging and not by exercise habituationMasahiro Horiuchi0Akira Saito1Kiyotaka Motoyama2Takehiro Tashiro3Daijiro Abe4National Institute of Fitness and Sports in KANOYACenter for Health and Sports Science, Kyushu Sangyo UniversityCenter for Health and Sports Science, Kyushu Sangyo UniversityCNP DesignCenter for Health and Sports Science, Kyushu Sangyo UniversityAbstract Objective A U-shaped relationship between energy cost of walking (C w ) and walking speed indicates that there is a specific speed minimizing the C w , called economical speed (ES). It is mostly slower in older adults than young adults; however, effects of leg length on the ES have been ignored. We investigated effects of aging and exercise habituation on the normalized ES by leg length (ESnormalized). We quantified time delay of stride length and step frequency in sedentary young (SY), active young (AY), and active elderly (AE) adults in response to sinusoidal gait speed change at 30-s and 180-s periods with an amplitude of ± 0.56 m･s− 1. Results The ES was significantly slower in the following sequence: AE, SY, and AY, whereas ESnormalized was slower in the AE than in other young groups, with no difference between AY and SY. AE and SY showed greater step variabilities at the 180-s period, whereas AY showed relatively smaller step variabilities at both periods. Collectively, the ESnormalized slowed due to aging, not due to exercise habituation. When optimizing the appropriate SL-SF combination for sinusoidal speed changes, young and elderly adults may adopt different strategies. Exercise habituation may reduce step variabilities in young adults.https://doi.org/10.1186/s13104-023-06545-2LocomotionGaitStep variabilityOptimal speedFroude number |
| spellingShingle | Masahiro Horiuchi Akira Saito Kiyotaka Motoyama Takehiro Tashiro Daijiro Abe Normalized economical speed is influenced by aging and not by exercise habituation BMC Research Notes Locomotion Gait Step variability Optimal speed Froude number |
| title | Normalized economical speed is influenced by aging and not by exercise habituation |
| title_full | Normalized economical speed is influenced by aging and not by exercise habituation |
| title_fullStr | Normalized economical speed is influenced by aging and not by exercise habituation |
| title_full_unstemmed | Normalized economical speed is influenced by aging and not by exercise habituation |
| title_short | Normalized economical speed is influenced by aging and not by exercise habituation |
| title_sort | normalized economical speed is influenced by aging and not by exercise habituation |
| topic | Locomotion Gait Step variability Optimal speed Froude number |
| url | https://doi.org/10.1186/s13104-023-06545-2 |
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