The role of muscle strength on tendon adaptability in old age

被引:5
作者
Holzer, D. [1 ]
Epro, G. [2 ]
McCrum, C. [3 ,4 ]
Doerner, J. [5 ]
Luetkens, J. A. [5 ]
Scheef, L. [5 ]
Kukuk, G. M. [5 ]
Boecker, H. [5 ]
Mierau, A. [6 ,7 ]
Brueggemann, G. -P. [8 ,9 ]
Maganaris, C. N. [1 ]
Karamanidis, K. [2 ]
机构
[1] Liverpool John Moores Univ, Sch Sport & Exercise Sci, Liverpool, Merseyside, England
[2] London South Bank Univ, Sch Appl Sci, Sport & Exercise Sci Res Ctr, 103 Borough Rd, London SE1 0AA, England
[3] Maastricht Univ, Med Ctr, NUTRIM Sch Nutr & Translat Res Metab, Dept Nutr & Movement Sci, Maastricht, Netherlands
[4] German Sport Univ Cologne, Inst Movement & Sport Gerontol, Cologne, Germany
[5] Univ Bonn, Dept Radiol, Bonn, Germany
[6] LUNEX Int Univ Hlth Exercise & Sports, Dept Exercise & Sport Sci, Differdange, Luxembourg
[7] German Sport Univ Cologne, Inst Movement & Neurosci, Cologne, Germany
[8] German Sport Univ Cologne, Inst Biomech & Orthopaed, Cologne, Germany
[9] Univ Cologne, Med Fac, Cologne Ctr Musculoskeletal Biomech, Cologne, Germany
关键词
Aging; Maximum muscle force; Triceps surae; Tendon stiffness; Young's modulus; Cross-sectional area; HUMAN ACHILLES-TENDON; TRICEPS SURAE MUSCLE; STRUCTURES IN-VIVO; MECHANICAL-PROPERTIES; PATELLAR TENDON; CYCLIC STRAIN; MORPHOLOGICAL PROPERTIES; VISCOELASTIC PROPERTIES; EXTRACELLULAR-MATRIX; SKELETAL-MUSCLE;
D O I
10.1007/s00421-018-3947-3
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
Purpose The purpose of the study was to determine: (1) the relationship between ankle plantarflexor muscle strength and Achilles tendon (AT) biomechanical properties in older female adults, and (2) whether muscle strength asymmetries between the individually dominant and non-dominant legs in the above subject group were accompanied by inter-limb AT size differences. Methods The maximal generated AT force, AT stiffness, AT Young's modulus, and AT cross-sectional area (CSA) along its length were determined for both legs in 30 women (65 +/- 7 years) using dynamometry, ultrasonography, and magnetic resonance imaging. Results No between-leg differences in triceps surae muscle strength were identified between dominant (2798 +/- 566 N) and non-dominant limb (2667 +/- 512 N). The AT CSA increased gradually in the proximo-distal direction, with no differences between the legs. There was a significant correlation (P < 0.05) of maximal AT force with AT stiffness (r = 0.500) and Young's modulus (r = 0.414), but only a tendency with the mean AT CSA. However, region-specific analysis revealed a significant relationship between maximal AT force and the proximal part of the AT, indicating that this region is more likely to display morphological adaptations following an increase in muscle strength in older adults. Conclusions These findings demonstrate that maximal force-generation capabilities play a more important role in the variation of AT stiffness and material properties than in tendon CSA, suggesting that exercise-induced increases in muscle strength in older adults may lead to changes in tendon stiffness foremost due to alterations in material rather than in its size.
引用
收藏
页码:2269 / 2279
页数:11
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