Effect of a patellar strap on the joint position sense of the symptomatic knee in athletes with patellar tendinopathy.

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Abstract

[Indexed for MEDLINE] 20. Scand J Med Sci Sports. 2017 Jan;27(1):75-82. doi: 10.1111/sms.12631. Epub 2015 Dec 8. Muscle and tendon adaptation in adolescent athletes: A longitudinal study. Mersmann F(1)(2), Bohm S(1)(2), Schroll A(1)(2), Boeth H(3), Duda GN(2)(3), Arampatzis A(1)(2). Author information: (1)Department of Training and Movement Sciences, Humboldt-Universität zu Berlin, Berlin, Germany. (2)Berlin School of Movement Science, Berlin, Germany. (3)Julius Wolff Institute, Charité - Universitätsmedizin Berlin, Berlin, Germany. There is evidence that a non-uniform adaptation of muscle and tendon in young athletes results in increased tendon stress during mid-adolescence. The present longitudinal study investigated the development of the morphological and mechanical properties of muscle and tendon of volleyball athletes in a time period of 2 years from mid-adolescence to late adolescence. Eighteen elite volleyball athletes participated in magnetic resonance imaging and ultrasound-dynamometry sessions to determine quadriceps femoris muscle strength, vastus lateralis, medialis and intermedius morphology, and patellar tendon mechanical and morphological properties in mid-adolescence (16 ± 1 years) and late adolescence (18 ± 1 years). Muscle strength, anatomical cross-sectional area (CSA), and volume showed significant (P