Muscle Activation Levels of the
Gluteus Maximus and Medius During Standing Hip Joint Strengthening Exercises
Using Elastic Tubing Resistance

Youdas,
JW, Adams, KE, Bertucci JE, Brooks KJ, Nelson MM, Hollman JH.  Journal
of Sports Rehabilitation
  2013, Epub
ahead of print.

Take Home Message:  Standing hip exercises with elastic tubing
resistance do not selectively activate or provide sufficient resistance for
strength training the gluteus maximus and medius muscles in healthy collegiate-aged subjects, and as such, may not provide the desired outcome when
implemented clinically. 
 
Gluteal
muscle weakness has been linked to numerous lower extremity injuries and is
very common after lower extremity surgery. 
Standing hip movements with elastic tubing resistance are among the most
commonly utilized exercises for targeting gluteal strength deficits.  The elastic tubing provides resistance to the
swing limb, but also requires activation of the contralateral limb for postural
stability.  The aim of this study was to
determine whether the swing or stance leg is more activated during four standing
hip exercises:  front-pull, back-pull,
cross-over pull, and reverse cross-over pull. The authors recruited 26 (13
male, 13 female) healthy college-aged individuals for this study.  While the participants performed three trials
of each exercise – which they did in a random order –  the authors measured muscle activation of the
gluteus maximus and gluteus medius using surface electromyography (EMG).  The gluteus maximus muscle had similar muscle
activation between the swing and stance limbs in all of the exercises, except
during the back-pull exercise.  During
the back-pull exercise the swing limb exhibited 3.2 times higher gluteus
maximus activity than the stance limb; this difference was attributed to the
increased resistance provided by the tension of the elastic tubing.  The back-pull exercise generated the largest gluteus
maximus activation level of the swing limb and the reverse cross-over pull
generated the largest gluteus maximus activation level of the stance leg.  The gluteus medius muscle had similar muscle
activation between the swing and stance limb in all of the exercises, except
for the front-pull exercise.  The gluteus
medius muscle of the stance limb demonstrated 1.7 times higher gluteus medius activation
than that swing limb.  The reverse
cross-over pull demanded the largest gluteus medius activation in both the
swing and stance limbs; attributed to the motion, resistance, and stabilization
occurring in the frontal plane. 

These
results raise an interesting question: 
Do our commonly utilized techniques meet our clinical goals?  It has been previously reported that a level
of 50% EMG activation is required to increase strength; the reverse cross-over
pull was the only exercise condition that reached this mark.  So is elastic tubing resistance sufficient
for gluteal muscle strengthening?  It’s
difficult to answer this question since the study only included healthy college-aged
individuals. These results may not apply to those with injury or patients of
different ages.  Most of these participants
also regularly engaged in physical activity and/or strength training.  These results may not apply to less active
patients. Despite these limitations, this study can help us in the clinical
setting by demonstrating the need for more advanced resistance exercises in the
treatment of younger and more active patients.

Questions for Discussion:  Do you commonly use elastic tubing in your
practice?  Do you obtain your desired
results?  What other methods do you use
to overcome gluteal strength deficits?

Written
by: Meghan Maume Miller
Reviewed
by:  Jeffery Driban

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Youdas JW, Adams KE, Bertucci JE, Brooks KJ, Nelson MM, & Hollman JH (2013). Muscle Activation Levels of the Gluteus Maximus and Medius During Standing Hip Joint Strengthening Exercises Using Elastic Tubing Resistance. Journal of Sport Rehabilitation PMID: 23921445