Activation of the hip adductor muscles varies during a simulated weight-bearing task

Phys Ther Sport. 2016 Jan:17:19-23. doi: 10.1016/j.ptsp.2015.06.001. Epub 2015 Jun 12.

Abstract

Objective: To investigate the pattern of muscle activation of the individual hip adductor muscles using a standardised simulated unilateral weight-bearing task.

Design: A repeated measures design.

Setting: Laboratory.

Participants: 20 healthy individuals (11 females, 9 males) participated in the study. Age ranged from 20 to 25 years.

Main outcome measurements: Surface electromyography recordings from adductor magnus and adductor longus muscles were taken at levels representing 10-50% of body weight during a simulated weight-bearing task. Electromyography (EMG) data were normalised to maximal voluntary isometric contraction.

Results: The adductor magnus was recruited at significantly higher levels than the adductor longus muscle during a simulated weight-bearing task performed across 10-50% of body weight (p < 0.01).

Conclusions: Adductor magnus and adductor longus muscles are recruited to different extents during a simulated weight-bearing task. This information should be considered when selecting exercises for management and prevention of groin strains. Closed chain exercises with weight-bearing through the lower limb are more likely to recruit the adductor magnus muscle over the adductor longus muscle.

Keywords: Adductor longus; Adductor magnus; Weight-bearing.

MeSH terms

  • Adult
  • Electromyography
  • Exercise / physiology*
  • Exercise Therapy / methods*
  • Female
  • Healthy Volunteers
  • Hip
  • Humans
  • Isometric Contraction / physiology*
  • Male
  • Muscle, Skeletal / physiology*
  • Weight-Bearing / physiology*
  • Young Adult