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European Journal of Applied Physiology

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01-01-2018 | Original Article

A cross-sectional study on the mechanical properties of the Achilles tendon with growth

Authors: Yasuyoshi Mogi, Suguru Torii, Yasuo Kawakami, Toshimasa Yanai

Published in: European Journal of Applied Physiology | Issue 1/2018

Abstract

Purpose

This study aimed to elucidate growth pattern of mechanical properties of the Achilles tendon and to examine if imbalance between growth of bone and muscle–tendon unit occurs during adolescence.

Methods

Fourteen elementary school boys, 30 junior high school boys, 20 high school boys and 15 male adults participated in this study. Based on estimated age at peak height velocity (PHV), junior high school boys were separated into two groups (before or after PHV). An ultrasonography technique was used to determine the length, cross-sectional area, stiffness and Young’s modulus of Achilles tendon. In addition, the maximum strain in “toe region” (strain_TP) was determined to describe the balance between growth of bone and muscle–tendon unit.

Results

No group difference was observed in length, cross-sectional area and strain_TP among the groups. However, stiffness and Young’s modulus in after PHV groups were significantly higher than those of elementary school boys and before PHV groups (p ≤ 0.05).

Conclusions

These results indicate that mechanical properties of Achilles tendon change dramatically at and/or around PHV to increased stiffness. The widely believed assumption that muscle–tendon unit is passively stretched due to rapid bone growth in adolescence is not supported.

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Title: A cross-sectional study on the mechanical properties of the Achilles tendon with growth
Authors: Yasuyoshi Mogi
Suguru Torii
Yasuo Kawakami
Toshimasa Yanai
Publication date: 01-01-2018
Publisher: Springer Berlin Heidelberg
Published in: European Journal of Applied Physiology / Issue 1/2018
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI: https://doi.org/10.1007/s00421-017-3760-4

At a glance: The STEP trials

Springer Medicine

A cross-sectional study on the mechanical properties of the Achilles tendon with growth

Abstract

Purpose

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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