Biceps femoris and semitendinosus tendon/aponeurosis strain during passive and active (isometric) conditions

 
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2016 (EN)
Biceps femoris and semitendinosus tendon/aponeurosis strain during passive and active (isometric) conditions

Kellis, Eleftherios

The purpose of this study was to quantify strain and elongation of the long head of the biceps femoris (BFlh) and the semitendinosus (ST) tendon/aponeurosis. Forty participants performed passive knee extension trials from 90° of knee flexion to full extension (0°) followed by ramp isometric contractions of the knee flexors at 0°, 45° and 90° of knee flexion. Two ultrasound probes were used to visualize the displacement of BFlh and ST tendon/aponeurosis. Three-way analysis of variance designs indicated that: (a) Tendon/aponeurosis (passive) elongation and strain were higher for the BFlh than the ST as the knee was passively extended (p < 0.05), (b) contraction at each angular position was accompanied by a smaller BFlh tendon/aponeurosis (active) strain and elongation than the ST at higher levels of effort (p < 0.05) and (c) combined (passive and active) strain was significantly higher for the BFlh than ST during ramp contraction at 0° but the opposite was observed for the 45° and 90° flexion angle tests (p < 0.05). Passive elongation of tendon/aponeurosis has an important effect on the tendon/aponeurosis behavior of the hamstrings and may contribute to a different loading of muscle fibers and tendinous tissue between BFlh and ST. © 2015 Elsevier Ltd.

Article / Άρθρο
info:eu-repo/semantics/article

Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (EL)
Aristotle University of Thessaloniki (EN)

English

2016
2016-09-28T19:33:51Z


Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης, Σχολή Επιστήμης Φυσικής Αγωγής και Αθλητισμού, Τμήμα Επιστήμης Φυσικής Αγωγής και Αθλητισμού (Σέρρες)

Journal of Electromyography & Kinesiology, vol.26 [2016] p.111-119
urn:ISSN:1050-6411

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