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Individual Muscle use in Hamstring Exercises by Soccer Players Assessed using Functional MRI.
Int J Sports Med. 2016 Jun; 37(7):559-64.IJ

Abstract

This study used functional magnetic resonance imaging (fMRI) to compare individual muscle use in exercises aimed at preventing hamstring injuries. Thirty-six professional soccer players were randomized into 4 groups, each performing either Nordic hamstring, flywheel leg curl, Russian belt or conic-pulley exercise. MRIs were performed before and immediately after a bout of 4 sets of 8 repetitions. Pre-post exercise differences in contrast shift (T2) were analyzed for the long (BFLh) and short head (BFSh) of biceps femoris, semitendinosus (ST), semimembranosus (SM) and gracilis (GR) muscles. Flywheel leg curl increased (P<0.001) T2 of GR (95%), ST (65%), BFSh (51%) and BFLh (14%). After the Nordic hamstring, GR (39%), ST (16%) and BFSh (14%) showed increased T2 (P<0.001). Russian belt and conic-pulley exercise produced subtle (P<0.02) T2 increases of ST (9 and 6%, respectively) and BFLh (7 and 6%, respectively). Russian belt increased T2 of SM (7%). Among exercises examined, flywheel leg curl showed the most substantial hamstring and GR muscle use. However, no single exercise executed was able to increase T2 of all hamstring and synergist muscles analyzed. It is therefore suggested that multiple exercises must be carried out to bring in, and fully activate all knee flexors and hip extensors.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Fernandez-Gonzalo R
Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden.
Tesch PA
Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden.
Linnehan RM
National Aeronautics and Space Administration, Johnson Space Center, Houston, United States.
Kreider RB
Exercise & Sport Nutrition Laboratory, Department of Health & Kinesiology, Texas A&M University, College Station, United States.
Di Salvo V
Department of Football Performance & Science, ASPIRE Academy, Doha, Qatar.
Suarez-Arrones L
Department of Football Performance & Science, ASPIRE Academy, Doha, Qatar.
Alomar X
Department of Radiology, Centres Mèdics Creu Blanca, Barcelona, Spain.
Mendez-Villanueva A
Department of Football Performance & Science, ASPIRE Academy, Doha, Qatar.
Rodas G
F.C. Barcelona, Medical Services F.C. Barcelona, Barcelona, Spain.

MeSH

AdolescentAthletic InjuriesHamstring MusclesHumansLegMagnetic Resonance ImagingResistance TrainingSoccerYoung Adult

Pub Type(s)

Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

27116347

Citation

Fernandez-Gonzalo, R, et al. "Individual Muscle Use in Hamstring Exercises By Soccer Players Assessed Using Functional MRI." International Journal of Sports Medicine, vol. 37, no. 7, 2016, pp. 559-64.
Fernandez-Gonzalo R, Tesch PA, Linnehan RM, et al. Individual Muscle use in Hamstring Exercises by Soccer Players Assessed using Functional MRI. Int J Sports Med. 2016;37(7):559-64.
Fernandez-Gonzalo, R., Tesch, P. A., Linnehan, R. M., Kreider, R. B., Di Salvo, V., Suarez-Arrones, L., Alomar, X., Mendez-Villanueva, A., & Rodas, G. (2016). Individual Muscle use in Hamstring Exercises by Soccer Players Assessed using Functional MRI. International Journal of Sports Medicine, 37(7), 559-64. https://doi.org/10.1055/s-0042-100290
Fernandez-Gonzalo R, et al. Individual Muscle Use in Hamstring Exercises By Soccer Players Assessed Using Functional MRI. Int J Sports Med. 2016;37(7):559-64. PubMed PMID: 27116347.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Individual Muscle use in Hamstring Exercises by Soccer Players Assessed using Functional MRI. AU - Fernandez-Gonzalo,R, AU - Tesch,P A, AU - Linnehan,R M, AU - Kreider,R B, AU - Di Salvo,V, AU - Suarez-Arrones,L, AU - Alomar,X, AU - Mendez-Villanueva,A, AU - Rodas,G, Y1 - 2016/04/26/ PY - 2016/4/27/entrez PY - 2016/4/27/pubmed PY - 2017/4/18/medline SP - 559 EP - 64 JF - International journal of sports medicine JO - Int J Sports Med VL - 37 IS - 7 N2 - This study used functional magnetic resonance imaging (fMRI) to compare individual muscle use in exercises aimed at preventing hamstring injuries. Thirty-six professional soccer players were randomized into 4 groups, each performing either Nordic hamstring, flywheel leg curl, Russian belt or conic-pulley exercise. MRIs were performed before and immediately after a bout of 4 sets of 8 repetitions. Pre-post exercise differences in contrast shift (T2) were analyzed for the long (BFLh) and short head (BFSh) of biceps femoris, semitendinosus (ST), semimembranosus (SM) and gracilis (GR) muscles. Flywheel leg curl increased (P<0.001) T2 of GR (95%), ST (65%), BFSh (51%) and BFLh (14%). After the Nordic hamstring, GR (39%), ST (16%) and BFSh (14%) showed increased T2 (P<0.001). Russian belt and conic-pulley exercise produced subtle (P<0.02) T2 increases of ST (9 and 6%, respectively) and BFLh (7 and 6%, respectively). Russian belt increased T2 of SM (7%). Among exercises examined, flywheel leg curl showed the most substantial hamstring and GR muscle use. However, no single exercise executed was able to increase T2 of all hamstring and synergist muscles analyzed. It is therefore suggested that multiple exercises must be carried out to bring in, and fully activate all knee flexors and hip extensors. SN - 1439-3964 UR - https://www.unboundmedicine.com/medline/citation/27116347/Individual_Muscle_use_in_Hamstring_Exercises_by_Soccer_Players_Assessed_using_Functional_MRI_ DB - PRIME DP - Unbound Medicine ER -