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Electromyographical Differences Between the Hyperextension and Reverse-Hyperextension.

Matthew Cuthbert1,2, Nicholas J Ripley1, Timothy J Suchomel1,3

  • 1Directorate of Psychology and Sport, University of Salford, Salford, Greater Manchester, United Kingdom.

Journal of Strength and Conditioning Research
|May 24, 2021
PubMed
Summary

The reverse-hyperextension exercise activates posterior chain muscles, including erector spinae and gluteus maximus, more intensely than the hyperextension. This suggests reverse-hyperextension may be more effective for building posterior chain strength.

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Area of Science:

  • Biomechanics
  • Exercise Physiology
  • Sports Science

Background:

  • Muscle activation patterns during resistance exercises are crucial for optimizing training outcomes.
  • The hyperextension (HE) and reverse-hyperextension (RHE) exercises target the posterior chain musculature.
  • Understanding the electromyographical (EMG) differences between HE and RHE can inform exercise selection for strength development.

Purpose of the Study:

  • To compare the muscle activation of the erector spinae (ES), gluteus maximus (GMax), and biceps femoris (BF) between the HE and RHE exercises.
  • To determine which exercise elicits greater muscle engagement in key posterior chain muscles.

Main Methods:

  • Ten healthy subjects performed normalized HE and RHE exercises.
  • Surface electromyography (EMG) was used to measure muscle activation in the ES, GMax, and BF.
  • Peak and mean EMG data were analyzed during extension and flexion phases of both exercises.

Main Results:

  • The RHE demonstrated significantly greater peak EMG activity compared to the HE across all tested muscles during both extension and flexion phases.
  • Mean EMG activity was significantly higher in the RHE compared to the HE for the ES and GMax during both phases, and for the BF during the extension phase.
  • High reliability (ICC ≥ 0.925) and low variability (CV < 10%) were observed for EMG measurements, indicating robust data.

Conclusions:

  • The reverse-hyperextension (RHE) exercise elicits significantly higher muscle activation in the erector spinae, gluteus maximus, and biceps femoris compared to the hyperextension (HE).
  • The RHE can be considered a more intense exercise for the posterior chain, potentially leading to greater strength gains.
  • These findings provide valuable insights for coaches and athletes selecting exercises to target posterior chain development.