Growth changes in the elastic properties of human tendon structures

K. Kubo, H. Kanehisa, Yasuo Kawakami, T. Fukanaga

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

The purpose of this study was to investigate the growth changes in the elastic properties of human tendon structures. 9 younger boys (age 10.8±0.9 years, YBG), 9 elder boys (14.8±0.3 years, EBG), and 14 young adult men (24.7±1.6 years, ADG) volunteered to take part in the present study. Using a B-mode ultrasonic apparatus, the elongation of tendon and aponeurosis of vastus lateralis muscle (VL) was noninvasively measured in vivo, while subjects performed the extension of knee joint isometrically with force production levels from zero (relax) to maximal voluntary contraction (MVC) within 5 seconds. A curvilinear relationship was found between elongation of tendon structures (dL) and muscle force (Fm). This relationship consisted of two components, a steep initial change in length followed by a linear-region. The relationship between dL and Fm was fitted to a linear regression, and then the dL and dFm within 50 to 100% MVC was defined as compliance of tendon structures. The MVC force was the greatest in ADG and the lowest in YBG among the three groups. Significant age-related differences were found in compliance; 4.1±0.9·10-2 mm/N for YBG, 2.9±1.1·10-2 mm/N for EBG and 1.8±0.3·10-2 mm/N for ADG. The dL/thigh length (TL) was significantly greater in YBG than in the other two groups above 0.35 MPa of Fm per muscle cross-sectional area (muscle stress). However, there was no significant difference between EBG and ADG in the relationship between dL/TL and muscle stress. The ratio of fascicle length to TL in YBG was significantly lower than those in the other two groups. These results suggest that the tendon structures in younger boys are more compliant than those in older boys and young men. The observed properties of tendon structures in the younger boys may play a role in protecting younger boys from athletic injuries associated with immature muscle-tendon complex.

Original languageEnglish
Pages (from-to)138-143
Number of pages6
JournalInternational Journal of Sports Medicine
Volume22
Issue number2
DOIs
Publication statusPublished - 2001
Externally publishedYes

Fingerprint

Tendons
Growth
Muscles
Thigh
Compliance
Athletic Injuries
Quadriceps Muscle
Knee Joint
Ultrasonics
Young Adult
Linear Models

Keywords

  • Children
  • Compliance
  • In vivo measurement
  • Ultrasonography
  • Vastus lateralis muscle

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Growth changes in the elastic properties of human tendon structures. / Kubo, K.; Kanehisa, H.; Kawakami, Yasuo; Fukanaga, T.

In: International Journal of Sports Medicine, Vol. 22, No. 2, 2001, p. 138-143.

Research output: Contribution to journalArticle

Kubo, K. ; Kanehisa, H. ; Kawakami, Yasuo ; Fukanaga, T. / Growth changes in the elastic properties of human tendon structures. In: International Journal of Sports Medicine. 2001 ; Vol. 22, No. 2. pp. 138-143.
@article{d6b9d43dafcf4d26abc7e94eb8537d62,
title = "Growth changes in the elastic properties of human tendon structures",
abstract = "The purpose of this study was to investigate the growth changes in the elastic properties of human tendon structures. 9 younger boys (age 10.8±0.9 years, YBG), 9 elder boys (14.8±0.3 years, EBG), and 14 young adult men (24.7±1.6 years, ADG) volunteered to take part in the present study. Using a B-mode ultrasonic apparatus, the elongation of tendon and aponeurosis of vastus lateralis muscle (VL) was noninvasively measured in vivo, while subjects performed the extension of knee joint isometrically with force production levels from zero (relax) to maximal voluntary contraction (MVC) within 5 seconds. A curvilinear relationship was found between elongation of tendon structures (dL) and muscle force (Fm). This relationship consisted of two components, a steep initial change in length followed by a linear-region. The relationship between dL and Fm was fitted to a linear regression, and then the dL and dFm within 50 to 100{\%} MVC was defined as compliance of tendon structures. The MVC force was the greatest in ADG and the lowest in YBG among the three groups. Significant age-related differences were found in compliance; 4.1±0.9·10-2 mm/N for YBG, 2.9±1.1·10-2 mm/N for EBG and 1.8±0.3·10-2 mm/N for ADG. The dL/thigh length (TL) was significantly greater in YBG than in the other two groups above 0.35 MPa of Fm per muscle cross-sectional area (muscle stress). However, there was no significant difference between EBG and ADG in the relationship between dL/TL and muscle stress. The ratio of fascicle length to TL in YBG was significantly lower than those in the other two groups. These results suggest that the tendon structures in younger boys are more compliant than those in older boys and young men. The observed properties of tendon structures in the younger boys may play a role in protecting younger boys from athletic injuries associated with immature muscle-tendon complex.",
keywords = "Children, Compliance, In vivo measurement, Ultrasonography, Vastus lateralis muscle",
author = "K. Kubo and H. Kanehisa and Yasuo Kawakami and T. Fukanaga",
year = "2001",
doi = "10.1055/s-2001-11337",
language = "English",
volume = "22",
pages = "138--143",
journal = "International Journal of Sports Medicine",
issn = "0172-4622",
publisher = "Georg Thieme Verlag",
number = "2",

}

TY - JOUR

T1 - Growth changes in the elastic properties of human tendon structures

AU - Kubo, K.

AU - Kanehisa, H.

AU - Kawakami, Yasuo

AU - Fukanaga, T.

PY - 2001

Y1 - 2001

N2 - The purpose of this study was to investigate the growth changes in the elastic properties of human tendon structures. 9 younger boys (age 10.8±0.9 years, YBG), 9 elder boys (14.8±0.3 years, EBG), and 14 young adult men (24.7±1.6 years, ADG) volunteered to take part in the present study. Using a B-mode ultrasonic apparatus, the elongation of tendon and aponeurosis of vastus lateralis muscle (VL) was noninvasively measured in vivo, while subjects performed the extension of knee joint isometrically with force production levels from zero (relax) to maximal voluntary contraction (MVC) within 5 seconds. A curvilinear relationship was found between elongation of tendon structures (dL) and muscle force (Fm). This relationship consisted of two components, a steep initial change in length followed by a linear-region. The relationship between dL and Fm was fitted to a linear regression, and then the dL and dFm within 50 to 100% MVC was defined as compliance of tendon structures. The MVC force was the greatest in ADG and the lowest in YBG among the three groups. Significant age-related differences were found in compliance; 4.1±0.9·10-2 mm/N for YBG, 2.9±1.1·10-2 mm/N for EBG and 1.8±0.3·10-2 mm/N for ADG. The dL/thigh length (TL) was significantly greater in YBG than in the other two groups above 0.35 MPa of Fm per muscle cross-sectional area (muscle stress). However, there was no significant difference between EBG and ADG in the relationship between dL/TL and muscle stress. The ratio of fascicle length to TL in YBG was significantly lower than those in the other two groups. These results suggest that the tendon structures in younger boys are more compliant than those in older boys and young men. The observed properties of tendon structures in the younger boys may play a role in protecting younger boys from athletic injuries associated with immature muscle-tendon complex.

AB - The purpose of this study was to investigate the growth changes in the elastic properties of human tendon structures. 9 younger boys (age 10.8±0.9 years, YBG), 9 elder boys (14.8±0.3 years, EBG), and 14 young adult men (24.7±1.6 years, ADG) volunteered to take part in the present study. Using a B-mode ultrasonic apparatus, the elongation of tendon and aponeurosis of vastus lateralis muscle (VL) was noninvasively measured in vivo, while subjects performed the extension of knee joint isometrically with force production levels from zero (relax) to maximal voluntary contraction (MVC) within 5 seconds. A curvilinear relationship was found between elongation of tendon structures (dL) and muscle force (Fm). This relationship consisted of two components, a steep initial change in length followed by a linear-region. The relationship between dL and Fm was fitted to a linear regression, and then the dL and dFm within 50 to 100% MVC was defined as compliance of tendon structures. The MVC force was the greatest in ADG and the lowest in YBG among the three groups. Significant age-related differences were found in compliance; 4.1±0.9·10-2 mm/N for YBG, 2.9±1.1·10-2 mm/N for EBG and 1.8±0.3·10-2 mm/N for ADG. The dL/thigh length (TL) was significantly greater in YBG than in the other two groups above 0.35 MPa of Fm per muscle cross-sectional area (muscle stress). However, there was no significant difference between EBG and ADG in the relationship between dL/TL and muscle stress. The ratio of fascicle length to TL in YBG was significantly lower than those in the other two groups. These results suggest that the tendon structures in younger boys are more compliant than those in older boys and young men. The observed properties of tendon structures in the younger boys may play a role in protecting younger boys from athletic injuries associated with immature muscle-tendon complex.

KW - Children

KW - Compliance

KW - In vivo measurement

KW - Ultrasonography

KW - Vastus lateralis muscle

UR - http://www.scopus.com/inward/record.url?scp=0035126599&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035126599&partnerID=8YFLogxK

U2 - 10.1055/s-2001-11337

DO - 10.1055/s-2001-11337

M3 - Article

C2 - 11281617

AN - SCOPUS:0035126599

VL - 22

SP - 138

EP - 143

JO - International Journal of Sports Medicine

JF - International Journal of Sports Medicine

SN - 0172-4622

IS - 2

ER -