Skeletal muscle architectural adaptations to marathon run training

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 la...

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Bibliographic Details
Published in:Applied physiology, nutrition, and metabolism nutrition, and metabolism, 2015-01, Vol.40 (1), p.99-102
Main Authors: Murach, Kevin, Greever, Cory, Luden, Nicholas D
Format: Article
Language:English
Subjects:
Adaptation (Physiology)
Adaptation, Physiological
Adult
angle de pennation
Athletes
Cohort Studies
Correlation analysis
exercice physique
Exercise
fascicle length
Female
Humans
Image Processing, Computer-Assisted
Lactic Acid - blood
longueur fasciculaire
Male
Marathon running
Marathons
Muscle, Skeletal - diagnostic imaging
Muscle, Skeletal - physiology
Muscles
Musculoskeletal system
Oxygen Consumption
pennation angle
Physical Endurance
Physical Exertion
Physiological aspects
Physiological research
Pilot Projects
Quadriceps Muscle - diagnostic imaging
Quadriceps Muscle - physiology
Recreation
Reproducibility of Results
Running
Sports training
Stress, Physiological
structure
Ultrasonography
Young Adult
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Description
Summary: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.
ISSN:1715-5312
1715-5320
DOI:10.1139/apnm-2014-0287