Electromyographic Analysis of Hip Abductor Exercises Performed by a Sample of Total Hip Arthroplasty Patients

Cale A. Jacobs, Matt Lewis, Lori A. Bolgla, Christian P. Christensen, Arthur J. Nitz, Timothy L. Uhl

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


Weakness of the hip abductors after total hip arthroplasty may result in pain and/or functional limitation. Non-weight-bearing (NWB) exercises are often performed to target the hip abductors; however, muscle activation of NWB exercises has not been compared to weight-bearing (WB) exercises. Our purpose was to evaluate gluteus medius activation during 2 WB and 2 NWB hip abductor strengthening exercises. Fifteen patients at least 6 weeks post unilateral total hip arthroplasty volunteered for the study. Electromyographic amplitude for each exercise was normalized to each patient's maximal voluntary isometric contraction. There were no significant differences in gluteus medius electromyographic amplitudes between the 4 exercises (P = .15). Based on our results, NWB exercises provided no clear benefit in terms of gluteus medius activation when compared to potentially more functional WB exercises in the early postoperative period.

Original languageEnglish (US)
Pages (from-to)1130-1136
Number of pages7
JournalJournal of Arthroplasty
Issue number7
StatePublished - Oct 2009


  • EMG
  • THA
  • closed kinetic chain
  • open kinetic chain

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine


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