Age and Sex Effects on the Active Stiffness of Vastus Intermedius under Isometric Contraction
Previously, a novel technique was proposed to quantify the relationship between the muscle stiffness and its nonfatigue contraction intensity. The method extended the measured range of isometric contraction to 100% maximum voluntary contraction (MVC) using an ultrasonic shear wave measurement setup....
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| Published in | BioMed research international Vol. 2017; no. 2017; pp. 1 - 16 |
|---|---|
| Main Authors | , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Cairo, Egypt
Hindawi Publishing Corporation
01.01.2017
Hindawi John Wiley & Sons, Inc |
| Subjects | |
| Online Access | Get full text |
| ISSN | 2314-6133 2314-6141 2314-6141 |
| DOI | 10.1155/2017/9469548 |
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| Abstract | Previously, a novel technique was proposed to quantify the relationship between the muscle stiffness and its nonfatigue contraction intensity. The method extended the measured range of isometric contraction to 100% maximum voluntary contraction (MVC) using an ultrasonic shear wave measurement setup. Yet, it has not been revealed how this relationship could be affected by factors like age or sex. To clarify these questions, vastus intermedius (VI) stiffness of 40 healthy subjects was assessed under 11 step levels of isometric contraction. The subjects were divided into four groups: young males, young females, elderly males, and elderly females (n=10 for each). In a relaxed state, no significant difference was observed between the male and female subjects (p=0.156) nor between the young and elderly subjects (p=0.221). However, when performing isometric contraction, the VI stiffness of males was found to be significantly higher than that of females at the same level (p<0.001), and that of the young was higher than the elderly (p<0.001). Meanwhile, for two knee joint angles used, the stiffness measured at a 90° knee joint angle was always significantly larger than that measured at 60° (p<0.001). Recognizing the active muscle stiffness of VI contributes to body stability, and these results may provide insight into the age and sex bias in musculoskeletal studies, such as those on fall risks. |
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| AbstractList | Previously, a novel technique was proposed to quantify the relationship between the muscle stiffness and its nonfatigue contraction intensity. The method extended the measured range of isometric contraction to 100% maximum voluntary contraction (MVC) using an ultrasonic shear wave measurement setup. Yet, it has not been revealed how this relationship could be affected by factors like age or sex. To clarify these questions, vastus intermedius (VI) stiffness of 40 healthy subjects was assessed under 11 step levels of isometric contraction. The subjects were divided into four groups: young males, young females, elderly males, and elderly females (n = 10 for each). In a relaxed state, no significant difference was observed between the male and female subjects (p = 0.156) nor between the young and elderly subjects (p = 0.221). However, when performing isometric contraction, the VI stiffness of males was found to be significantly higher than that of females at the same level (p < 0.001), and that of the young was higher than the elderly (p < 0.001). Meanwhile, for two knee joint angles used, the stiffness measured at a 90° knee joint angle was always significantly larger than that measured at 60° (p < 0.001). Recognizing the active muscle stiffness of VI contributes to body stability, and these results may provide insight into the age and sex bias in musculoskeletal studies, such as those on fall risks.Previously, a novel technique was proposed to quantify the relationship between the muscle stiffness and its nonfatigue contraction intensity. The method extended the measured range of isometric contraction to 100% maximum voluntary contraction (MVC) using an ultrasonic shear wave measurement setup. Yet, it has not been revealed how this relationship could be affected by factors like age or sex. To clarify these questions, vastus intermedius (VI) stiffness of 40 healthy subjects was assessed under 11 step levels of isometric contraction. The subjects were divided into four groups: young males, young females, elderly males, and elderly females (n = 10 for each). In a relaxed state, no significant difference was observed between the male and female subjects (p = 0.156) nor between the young and elderly subjects (p = 0.221). However, when performing isometric contraction, the VI stiffness of males was found to be significantly higher than that of females at the same level (p < 0.001), and that of the young was higher than the elderly (p < 0.001). Meanwhile, for two knee joint angles used, the stiffness measured at a 90° knee joint angle was always significantly larger than that measured at 60° (p < 0.001). Recognizing the active muscle stiffness of VI contributes to body stability, and these results may provide insight into the age and sex bias in musculoskeletal studies, such as those on fall risks. Previously, a novel technique was proposed to quantify the relationship between the muscle stiffness and its nonfatigue contraction intensity. The method extended the measured range of isometric contraction to 100% maximum voluntary contraction (MVC) using an ultrasonic shear wave measurement setup. Yet, it has not been revealed how this relationship could be affected by factors like age or sex. To clarify these questions, vastus intermedius (VI) stiffness of 40 healthy subjects was assessed under 11 step levels of isometric contraction. The subjects were divided into four groups: young males, young females, elderly males, and elderly females (n = 10 for each). In a relaxed state, no significant difference was observed between the male and female subjects (p = 0.156) nor between the young and elderly subjects (p = 0.221). However, when performing isometric contraction, the VI stiffness of males was found to be significantly higher than that of females at the same level (p < 0.001), and that of the young was higher than the elderly (p < 0.001). Meanwhile, for two knee joint angles used, the stiffness measured at a 90[degrees] knee joint angle was always significantly larger than that measured at 60[degrees] (p < 0.001). Recognizing the active muscle stiffness of VI contributes to body stability, and these results may provide insight into the age and sex bias in musculoskeletal studies, such as those on fall risks. Previously, a novel technique was proposed to quantify the relationship between the muscle stiffness and its nonfatigue contraction intensity. The method extended the measured range of isometric contraction to 100% maximum voluntary contraction (MVC) using an ultrasonic shear wave measurement setup. Yet, it has not been revealed how this relationship could be affected by factors like age or sex. To clarify these questions, vastus intermedius (VI) stiffness of 40 healthy subjects was assessed under 11 step levels of isometric contraction. The subjects were divided into four groups: young males, young females, elderly males, and elderly females ( n = 1 0 for each). In a relaxed state, no significant difference was observed between the male and female subjects ( p = 0.156 ) nor between the young and elderly subjects ( p = 0.221 ). However, when performing isometric contraction, the VI stiffness of males was found to be significantly higher than that of females at the same level ( p < 0.001 ), and that of the young was higher than the elderly ( p < 0.001 ). Meanwhile, for two knee joint angles used, the stiffness measured at a 90° knee joint angle was always significantly larger than that measured at 60° ( p < 0.001 ). Recognizing the active muscle stiffness of VI contributes to body stability, and these results may provide insight into the age and sex bias in musculoskeletal studies, such as those on fall risks. Previously, a novel technique was proposed to quantify the relationship between the muscle stiffness and its nonfatigue contraction intensity. The method extended the measured range of isometric contraction to 100% maximum voluntary contraction (MVC) using an ultrasonic shear wave measurement setup. Yet, it has not been revealed how this relationship could be affected by factors like age or sex. To clarify these questions, vastus intermedius (VI) stiffness of 40 healthy subjects was assessed under 11 step levels of isometric contraction. The subjects were divided into four groups: young males, young females, elderly males, and elderly females ( = 10 for each). In a relaxed state, no significant difference was observed between the male and female subjects ( = 0.156) nor between the young and elderly subjects ( = 0.221). However, when performing isometric contraction, the VI stiffness of males was found to be significantly higher than that of females at the same level ( < 0.001), and that of the young was higher than the elderly ( < 0.001). Meanwhile, for two knee joint angles used, the stiffness measured at a 90° knee joint angle was always significantly larger than that measured at 60° ( < 0.001). Recognizing the active muscle stiffness of VI contributes to body stability, and these results may provide insight into the age and sex bias in musculoskeletal studies, such as those on fall risks. Previously, a novel technique was proposed to quantify the relationship between the muscle stiffness and its nonfatigue contraction intensity. The method extended the measured range of isometric contraction to 100% maximum voluntary contraction (MVC) using an ultrasonic shear wave measurement setup. Yet, it has not been revealed how this relationship could be affected by factors like age or sex. To clarify these questions, vastus intermedius (VI) stiffness of 40 healthy subjects was assessed under 11 step levels of isometric contraction. The subjects were divided into four groups: young males, young females, elderly males, and elderly females (n=10 for each). In a relaxed state, no significant difference was observed between the male and female subjects (p=0.156) nor between the young and elderly subjects (p=0.221). However, when performing isometric contraction, the VI stiffness of males was found to be significantly higher than that of females at the same level (p<0.001), and that of the young was higher than the elderly (p<0.001). Meanwhile, for two knee joint angles used, the stiffness measured at a 90° knee joint angle was always significantly larger than that measured at 60° (p<0.001). Recognizing the active muscle stiffness of VI contributes to body stability, and these results may provide insight into the age and sex bias in musculoskeletal studies, such as those on fall risks. Previously, a novel technique was proposed to quantify the relationship between the muscle stiffness and its nonfatigue contraction intensity. The method extended the measured range of isometric contraction to 100% maximum voluntary contraction (MVC) using an ultrasonic shear wave measurement setup. Yet, it has not been revealed how this relationship could be affected by factors like age or sex. To clarify these questions, vastus intermedius (VI) stiffness of 40 healthy subjects was assessed under 11 step levels of isometric contraction. The subjects were divided into four groups: young males, young females, elderly males, and elderly females ( n = 10 for each). In a relaxed state, no significant difference was observed between the male and female subjects ( p = 0.156) nor between the young and elderly subjects ( p = 0.221). However, when performing isometric contraction, the VI stiffness of males was found to be significantly higher than that of females at the same level ( p < 0.001), and that of the young was higher than the elderly ( p < 0.001). Meanwhile, for two knee joint angles used, the stiffness measured at a 90° knee joint angle was always significantly larger than that measured at 60° ( p < 0.001). Recognizing the active muscle stiffness of VI contributes to body stability, and these results may provide insight into the age and sex bias in musculoskeletal studies, such as those on fall risks. Previously, a novel technique was proposed to quantify the relationship between the muscle stiffness and its nonfatigue contraction intensity. The method extended the measured range of isometric contraction to 100% maximum voluntary contraction (MVC) using an ultrasonic shear wave measurement setup. Yet, it has not been revealed how this relationship could be affected by factors like age or sex. To clarify these questions, vastus intermedius (VI) stiffness of 40 healthy subjects was assessed under 11 step levels of isometric contraction. The subjects were divided into four groups: young males, young females, elderly males, and elderly females (n=10 for each). In a relaxed state, no significant difference was observed between the male and female subjects (p=0.156) nor between the young and elderly subjects (p=0.221). However, when performing isometric contraction, the VI stiffness of males was found to be significantly higher than that of females at the same level (p<0.001), and that of the young was higher than the elderly (p<0.001). Meanwhile, for two knee joint angles used, the stiffness measured at a 90 degree knee joint angle was always significantly larger than that measured at 60 degree (p<0.001). Recognizing the active muscle stiffness of VI contributes to body stability, and these results may provide insight into the age and sex bias in musculoskeletal studies, such as those on fall risks. |
| Audience | Academic |
| Author | Zheng, Yong-Ping Zhou, Yongjin Guo, Jing-Yi Shi, Wenxiu Li, Tian-Jie Wang, Cong-Zhi |
| AuthorAffiliation | 1 Paul C. Lauterbur Research Center for Biomedical Imaging, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China 3 School of Biomedical Engineering, Shenzhen University, Shenzhen, China 2 Interdisciplinary Division of Biomedical Engineering, the Hong Kong Polytechnic University, Hong Kong |
| AuthorAffiliation_xml | – name: 1 Paul C. Lauterbur Research Center for Biomedical Imaging, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China – name: 2 Interdisciplinary Division of Biomedical Engineering, the Hong Kong Polytechnic University, Hong Kong – name: 3 School of Biomedical Engineering, Shenzhen University, Shenzhen, China |
| Author_xml | – sequence: 1 fullname: Shi, Wenxiu – sequence: 2 fullname: Zhou, Yongjin – sequence: 3 fullname: Li, Tian-Jie – sequence: 4 fullname: Guo, Jing-Yi – sequence: 5 fullname: Wang, Cong-Zhi – sequence: 6 fullname: Zheng, Yong-Ping |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/28473990$$D View this record in MEDLINE/PubMed |
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| CitedBy_id | crossref_primary_10_1007_s41999_024_01103_w crossref_primary_10_3389_fphys_2023_1337170 crossref_primary_10_1055_a_1293_8057 crossref_primary_10_1007_s40520_019_01139_0 crossref_primary_10_3389_fphys_2022_836435 crossref_primary_10_1139_apnm_2023_0557 crossref_primary_10_1038_s41598_023_47468_z crossref_primary_10_1051_e3sconf_202344805018 crossref_primary_10_3389_fmed_2020_00434 |
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| ContentType | Journal Article |
| Copyright | Copyright © 2017 Cong-Zhi Wang et al. COPYRIGHT 2017 John Wiley & Sons, Inc. Copyright © 2017 Cong-Zhi Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright © 2017 Cong-Zhi Wang et al. 2017 |
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| Snippet | Previously, a novel technique was proposed to quantify the relationship between the muscle stiffness and its nonfatigue contraction intensity. The method... |
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| SubjectTerms | Adult Age Age Factors Aged Aging Biomedical engineering Electromyography Female Gender differences Humans Isometric Contraction - physiology Knee Knee Joint - physiology Male Mechanical properties Middle Aged Morphology Muscle contraction Muscle, Skeletal - physiology Musculoskeletal system Physiological aspects Quadriceps Muscle - physiology R&D Range of Motion, Articular - physiology Research & development Sex Characteristics Studies Young Adult |
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| Title | Age and Sex Effects on the Active Stiffness of Vastus Intermedius under Isometric Contraction |
| URI | https://search.emarefa.net/detail/BIM-1139549 https://dx.doi.org/10.1155/2017/9469548 https://www.ncbi.nlm.nih.gov/pubmed/28473990 https://www.proquest.com/docview/1889364720 https://www.proquest.com/docview/1896041144 https://www.proquest.com/docview/1897381535 https://pubmed.ncbi.nlm.nih.gov/PMC5394906 |
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