Document Detail

Changes in skeletal muscle architecture following a cycloergometer test to exhaustion in athletes.
MedLine Citation:
PMID:  17905658     Owner:  NLM     Status:  MEDLINE    
We determined whether a short-term exhaustive dynamic exercise (cycling) for about 18min induces changes in the intramuscular architecture of the quadriceps in trained athletes. Thirty-five male athletes (age 28.8+/-9.8 years; height: 175.4.+/-5.5cm; weight: 74+/-11.5kg; average years spent training: 11.1+/-8.4 years; mean weekly duration of training: 10.4+/-3.20h) underwent an incremental cycloergometer test to exhaustion. Muscle thickness of the right quadriceps femoris (rectus femoris + vastus intermedius), and the angle of pennation of the right vastus lateralis on the quadriceps tendon were determined by high-resolution real time ultrasonography. Quadriceps thickness increased from 32.1+/-3.3mm at rest to 34.9+/-3.0mm after the test (p=0.001). The pennation angles were significantly greater after exercise (12.8+/-2.1 degrees at rest; 14.4+/-2.5 degrees after the test (p=0.001)). There are marked changes in intramuscular architecture of the quadriceps following a bout of cycloergometer exercise to exhaustion, with significant increase of quadriceps thickness and pennation angle. Ultrasonography allows to evaluate the changes of muscle architecture following exercise.
Paola Brancaccio; Francesco Mario Limongelli; Antonio D'Aponte; Marco Narici; Nicola Maffulli
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Publication Detail:
Type:  Journal Article     Date:  2007-10-01
Journal Detail:
Title:  Journal of science and medicine in sport / Sports Medicine Australia     Volume:  11     ISSN:  1440-2440     ISO Abbreviation:  J Sci Med Sport     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-10-28     Completed Date:  2009-02-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9812598     Medline TA:  J Sci Med Sport     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  538-41     Citation Subset:  IM    
Seconda Università di Napoli, Servizio di Medicina dello Sport, Napoli, Italy.
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MeSH Terms
Bicycling / physiology*
Ergometry / instrumentation
Physical Exertion / physiology*
Quadriceps Muscle / metabolism*,  physiology,  ultrasonography
Young Adult

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