Comparison of hip extensor muscle activity including the adductor magnus during three prone hip extension exercises

Physiother Theory Pract. 2019 May;35(5):451-457. doi: 10.1080/09593985.2018.1453569. Epub 2018 Mar 30.


Objectives: This study compared the role of the adductor magnus muscle (Amag) as a hip extensor while performing active prone hip extension (PHE), PHE with hip adduction (PHE-ADD), and PHE with hip abduction (PHE-ABD) with the gluteus maximus (Gmax) and hamstrings.

Methods: The study recruited 22 healthy participants. Electromyography data were recorded from the Amag, Gmax, and medial and lateral hamstrings during PHE, PHE-ADD, and PHE-ABD. Normalized electromyographic data were examined using one-way, repeated-measures analyses of variance.

Results: The magnitude of the Amag, Gmax, and hamstring activations did not differ significantly while performing PHE (p = 0.41). Furthermore, the Amag and hamstring activations were significantly greater than the Gmax activation when performing PHE-ADD (p < 0.05). The Gmax showed significantly greater activation during PHE-ABD than the Amag and medial and lateral hamstrings (p < 0.05).

Conclusions: Based on these results, we advocate including the Amag as a hip extensor during the PHE test or exercise. Our preliminary results have the potential to be applied directly to the PHE test, for investigating the muscle-activation pattern of the Amag with the Gmax and hamstrings in patients with hip or lower back pain.

Keywords: Adductor magnus; electromyography; hip extensor; prone hip extension.

Publication types

  • Comparative Study

MeSH terms

  • Adult
  • Biomechanical Phenomena
  • Electromyography
  • Female
  • Hamstring Muscles / physiology
  • Hip Joint / physiology*
  • Humans
  • Male
  • Muscle Contraction*
  • Muscle, Skeletal / physiology*
  • Preliminary Data
  • Range of Motion, Articular
  • Young Adult