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Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations
Published on: May 1, 2018
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Changes in rectus femoris architecture induced by the reverse nordic hamstring exercises.
Diego Alonso-Fernandez1,2, Rosana Fernandez-Rodriguez1, Rocío Abalo-Núñez3,4
1Department of Special Didactics, Faculty of Science Education and Sport, University of Vigo, Vigo, Spain.
The Journal of Sports Medicine and Physical Fitness
|October 9, 2018
Summary
Eccentric training using reverse nordic hamstring exercises (RNHE) significantly increases rectus femoris muscle size and architecture. These muscle adaptations are reversible after a 4-week detraining period, offering potential for injury prevention.
Area of Science:
- Exercise Physiology
- Muscle Adaptation
- Biomechanics
Background:
- Muscle architecture changes impact function.
- Rectus femoris (RF) adaptations to eccentric training with reverse nordic hamstring exercises (RNHE) are unstudied.
Purpose of the Study:
- To determine architectural adaptations of the RF after eccentric training with RNHE.
- To assess reversibility of these adaptations after detraining.
Main Methods:
- 26 subjects underwent 8 weeks of eccentric training with RNHE, followed by 4 weeks of detraining.
- 2D ultrasound assessed RF architectural characteristics (fascicle length, muscle thickness, pennation angle, CSA) at baseline, post-training, and post-detraining.
Main Results:
- Eccentric training significantly increased RF fascicle length, muscle thickness, pennation angle, and cross-sectional area.
- All architectural changes were significantly reduced after the 4-week detraining period.
Conclusions:
- RNHE induces reversible changes in RF muscle architecture.
- These adaptations may have implications for injury prevention and rehabilitation programs.
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