RT Journal Article
T1 Changes in rectus femoris architecture induced by the reverse nordic hamstring exercises
A1 Alonso Fernández, Diego
A1 Fernández Rodríguez, Rosana
A1 Abalo Nuñez, Maria Del Rocio
K1 2411.06 Fisiología del Ejercicio
K1 2411.10 Fisiología del Músculo
AB BACKGROUND: Injuries and mechanical stimuli alter the muscle architecture and, therefore, its function. The changes in the architecture ofthe rectus femoris (RF) induced by an eccentric training protocol with reverse nordic hamstring exercises (RNHE) have never been studied.Therefore, the aim of the present study was to determine the architectural adaptations of the RF after an eccentric training with RNHE, followedby a subsequent detraining period.METHODS: Twenty-six subjects performed a first week of control, 8 weeks of eccentric training, concluding with a 4-week period of detraining.The architectural characteristics of the RF were evaluated using 2D ultrasound at rest (pretest: week 1), after the training (post-test: week 9), andat the end of the detraining period (retest: week 13).RESULTS: At the end of the training period, a significant increase in the muscle fascicle length (FL) (t=-8.96, d=2.22, P<0.001), muscle thick-ness (MT) (t=-8.76, d=2.219, P<0.001), pennation angle (PA) (t=-9.83, d=2.49, P<0.05) and cross-sectional area (CSA) (t=-13.06, d=3.06,P<0.001) was observed. After the detraining period FL, MT, PA and CSA showed a significant decrease.CONCLUSIONS: The eccentric training with RNHE may cause changes in the architectural conditions of RF, which, in addition, are also revers-ible after a 4-week detraining period. The adaptations produced by RNHE may have practical implications for injury prevention and rehabilita-tion programs, which include the changes in muscle architecture variables.
PB Journal Of Sports Medicine And Physical Fitness
SN 00224707
YR 2019
FD 2019-04
LK http://hdl.handle.net/11093/7065
UL http://hdl.handle.net/11093/7065
LA eng
NO Journal Of Sports Medicine And Physical Fitness, 59(4): 640-647 (2019)
DS Investigo
RD 17-sep-2024