10.1371/journal.pone.0161356
Alberto Mendez-Villanueva
Alberto
Mendez-Villanueva
Luis Suarez-Arrones
Luis
Suarez-Arrones
Gil Rodas
Gil
Rodas
Rodrigo Fernandez-Gonzalo
Rodrigo
Fernandez-Gonzalo
Per Tesch
Per
Tesch
Richard Linnehan
Richard
Linnehan
Richard Kreider
Richard
Kreider
Valter Di Salvo
Valter
Di Salvo
MRI-Based Regional Muscle Use during Hamstring Strengthening Exercises in Elite Soccer Players
Public Library of Science
2016
BF
T 2 increase
T 2 values
MRI-Based Regional Muscle
hip-extension conic-pulley exercise
BFl
flywheel leg-curl
Elite Soccer Players
training
region
ST
SM
Hamstring Strengthening Exercises
Russian belt deadlift
elite soccer players
2016-09-01 04:30:01
Dataset
https://plos.figshare.com/articles/dataset/MRI-Based_Regional_Muscle_Use_during_Hamstring_Strengthening_Exercises_in_Elite_Soccer_Players/3799836
<div><p>The present study examined site-specific hamstring muscles use with functional magnetic resonance imaging (MRI) in elite soccer players during strength training. Thirty-six players were randomized into four groups, each performing either Nordic hamstring, flywheel leg-curl, Russian belt or the hip-extension conic-pulley exercise. The transverse relaxation time (T<sub>2</sub>) shift from pre- to post-MRI were calculated for the biceps femoris long (BFl) and short (BFs) heads, semitendinosus (ST) and semimembranosus (SM) muscles at proximal, middle and distal areas of the muscle length. T<sub>2</sub> values increased substantially after flywheel leg-curl in all regions of the BFl (from 9±8 to 16±8%), BFs (41±6–71±11%), and ST (60±1–69±7%). Nordic hamstring induced a substantial T<sub>2</sub> increase in all regions of the BFs (13±8–16±5%) and ST (15±7–17±5%). T<sub>2</sub> values after the Russian belt deadlift substantially increased in all regions of the BFl (6±4–7±5%), ST (8±3–11±2%), SM (6±4–10±4%), and proximal and distal regions of BFs (6±6–8±5%). T<sub>2</sub> values substantially increased after hip-extension conic-pulley only in proximal and middle regions of BFl (11±5–7±5%) and ST (7±3–12±4%). The relevance of such MRI-based inter- and intra-muscle use in designing more effective resistance training for improving hamstring function and preventing hamstring injuries in elite soccer players should be explored with more mechanistic studies.</p></div>