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Skeletal muscle architectural adaptations to marathon run training

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We assessed lateral gastrocnemius (LG) and vastus lateralis (VL) architecture in 16 recreational runners before and after 12 weeks of marathon training. LG fascicle length decreased 10% while pennation angle increased 17% (p < 0.05). There was a significant correlation between diminished blood lactate levels and LG pennation angle change (r = 0.90). No changes were observed in VL. This is the first evidence that run training can modify skeletal muscle architectural features.
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Keywords: angle de pennation; exercice physique; exercise; fascicle length; longueur fasciculaire; pennation angle; structure

Document Type: Research Article

Publication date: January 1, 2015

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