TY - JOUR
T1 - Hamstring functions during hip-extension exercise assessed with electromyography and magnetic resonance imaging
AU - Ono, Takashi
AU - Higashihara, Ayako
AU - Fukubayashi, Toru
PY - 2011/1
Y1 - 2011/1
N2 - The purpose of this study was to compare the recruitment patterns in hamstring muscles during hip extension exercise by electromyography (EMG) and muscle functional magnetic resonance imaging (mfMRI). Six male volunteers performed 5 sets of 10 repetitions of the hip extension exercise. Electromyography (EMG) activity during the exercise was recorded for the biceps femoris long head (BFlh), semitendinosus (ST), and semimembranosus (SM) muscles; mfMRI T2 values and cross-sectional areas (CSAs) of the same muscles were measured at rest, immediately after, 2 and 7 days after the exercise. The study found that EMG of the BFlh and SM were significantly higher than that of the ST. Immediately after the exercise, the T2 value and CSA changes in the SM showed a significant increase. It was concluded that the BFlh and SM were selectively recruited during the hip extension exercise.
AB - The purpose of this study was to compare the recruitment patterns in hamstring muscles during hip extension exercise by electromyography (EMG) and muscle functional magnetic resonance imaging (mfMRI). Six male volunteers performed 5 sets of 10 repetitions of the hip extension exercise. Electromyography (EMG) activity during the exercise was recorded for the biceps femoris long head (BFlh), semitendinosus (ST), and semimembranosus (SM) muscles; mfMRI T2 values and cross-sectional areas (CSAs) of the same muscles were measured at rest, immediately after, 2 and 7 days after the exercise. The study found that EMG of the BFlh and SM were significantly higher than that of the ST. Immediately after the exercise, the T2 value and CSA changes in the SM showed a significant increase. It was concluded that the BFlh and SM were selectively recruited during the hip extension exercise.
KW - eccentric contraction
KW - muscle strain
KW - pennate muscles
KW - recruitment pattern
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U2 - 10.1080/15438627.2011.535769
DO - 10.1080/15438627.2011.535769
M3 - Article
C2 - 21253975
AN - SCOPUS:79251474949
VL - 19
SP - 42
EP - 52
JO - Sports Training, Medicine and Rehabilitation
JF - Sports Training, Medicine and Rehabilitation
SN - 1543-8627
IS - 1
ER -