Regional differences in hamstring muscle damage after a marathon

Autor: Toshihiro Maemichi, Mako Fukano, Ayako Higashihara, Kento Nakagawa, Satoru Hashizume, Takaya Narita, Satoshi Iizuka, Takayuki Inami, Norikazu Hirose
Rok vydání: 2020
Předmět:
Male
Hamstring muscles
Time Factors
Muscle Physiology
Physiology
Knees
Marathon running
Hamstring Muscles
Knee Joints
Muscle damage
Biceps
Running
Diagnostic Radiology
0302 clinical medicine
Japan
Skeletal Joints
Medicine and Health Sciences
Medicine
Musculoskeletal System
Multidisciplinary
Radiology and Imaging
Physics
Classical Mechanics
Anatomy
Magnetic Resonance Imaging
medicine.anatomical_structure
Athletic Injuries
Physical Sciences
Legs
Female
medicine.symptom
Muscle contraction
Research Article
Muscle Contraction
Muscle tissue
Imaging Techniques
Science
Muscle Tissue
Athletic Performance
Research and Analysis Methods
03 medical and health sciences
Young Adult
Motion
Diagnostic Medicine
Isometric Contraction
Humans
Damage Mechanics
business.industry
Biological Locomotion
Biology and Life Sciences
030229 sport sciences
Biological Tissue
Torque
Body Limbs
business
human activities
030217 neurology & neurosurgery
Hamstring
Regional differences
Zdroj: PLoS ONE
PLoS ONE, Vol 15, Iss 6, p e0234401 (2020)
ISSN: 1932-6203
Popis: Previous studies suggest that marathon running induces lower extremity muscle damage. This study aimed to examine inter- and intramuscular differences in hamstring muscle damage after a marathon using transverse relaxation time (T2)-weighted magnetic resonance images (MRI). 20 healthy collegiate marathon runners (15 males) were recruited for this study. T2-MRI was performed before (PRE) and at 1 (D1), 3 (D3), and 8 days (D8) after marathon, and the T2 values of each hamstring muscle at the distal, middle, and proximal sites were calculated. Results indicated that no significant intermuscular differences in T2 changes were observed and that, regardless of muscle, the T2 values of the distal and middle sites increased significantly at D1 and D3 and recovered at D8, although those values of the proximal site remained constant. T2 significantly increased at distal and middle sites of the biceps femoris long head on D1 (p = 0.030 and p = 0.004, respectively) and D3 (p = 0.007 and p = 0.041, respectively), distal biceps femoris short head on D1 (p = 0.036), distal semitendinosus on D1 (p = 0.047) and D3 (p = 0.010), middle semitendinosus on D1 (p = 0.005), and distal and middle sites of the semimembranosus on D1 (p = 0.008 and p = 0.040, respectively) and D3 (p = 0.002 and p = 0.018, respectively). These results suggest that the distal and middle sites of the hamstring muscles are more susceptible to damage induced by running a full marathon. Conditioning that focuses on the distal and middle sites of the hamstring muscles may be more useful in improving recovery strategies after prolonged running.
Databáze: OpenAIRE
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