Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
©Journal of Sports Science and Medicine (2016) 15, 75 - 79

Case report
Use of Ultrasound to Monitor Biceps Femoris Mechanical Adaptations after Injury in a Professional Soccer Player
Eleftherios Kellis1, , Nikiforos Galanis2, Chrysanthos Chrysanthou3, Nikolaos Kofotolis1
Author Information
1 Laboratory of Neuromechanics, Department of Physical Education and Sport Sciences at Serres,
2 Division of Sports Medicine, Department of Orthopaedics, Papageorgiou General Hospital, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece
3 European Interbalkan Medical Center, Thessaloniki, Greece

Eleftherios Kellis
‚úČ TEFAA Serres, AgiosIoannis,Serres, 62110, Greece
Publish Date
Received: 26-10-2015
Accepted: 25-11-2015
Published (online): 23-02-2016
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This study examined the use of ultrasound to monitor changes in the long head of the biceps femoris (BF) architecture of aprofessional soccer player with acute first-time hamstring strain. The player followed a 14 session physiotherapy treatment until return to sport. The pennation angle and aponeurosis strain of the long head of the biceps femoris (BF) were monitored at 6 occasions (up until 1 year) after injury. The size of the scar / hematoma was reduced by 63.56% (length) and 67.9% (width) after the intervention and it was almost non-traceable one year after injury. The pennation angle of the fascicles underneath the scar showed a decline of 51.4% at the end of the intervention while an increase of 109.2% of the fascicles which were closer to deep aponeurosis was observed. In contrast, pennation angle of fascicles located away from the injury site were relatively unaffected. The treatment intervention resulted in a 57.9% to 77.3% decline of maximum strain per unit of MVC moment and remained similar one year after the intervention. This study provided an example of the potential use of ultrasound-based parameters to link the mechanical adaptations of the injured muscle to specific therapeutic intervention.

Key words: Ultrasound imaging, tissue mechanics, therapeutic exercise, muscle physiology / performance, EMG, Biomechanics/lower extremity

           Key Points
  • Changes in fascicle orientation after biceps femoris mild tear were reduced after a 28 day intervention and remained similar one year after injury.
  • Tendon/aponeurosis strain per unit of moment of force decreased during the course of the therapeutic intervention.
  • Future studies could utilize ultrasonography to monitor mechanical responses after various types of hamstring injury and interventions in order to improve criteria for a safe return to sport.
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