Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Clinical Trial
, 35 (8), 487-94

Electromyographic Analysis of Hip Rehabilitation Exercises in a Group of Healthy Subjects

Affiliations
Clinical Trial

Electromyographic Analysis of Hip Rehabilitation Exercises in a Group of Healthy Subjects

Lori A Bolgla et al. J Orthop Sports Phys Ther.

Abstract

Study design: Single-occasion, repeated-measures design.

Objective: To determine the magnitude of hip abductor muscle activation during 6 rehabilitation exercises.

Background: Many researchers have reported that hip strengthening, especially of the hip abductors, is an important component of a lower extremity rehabilitation program. Clinicians employ non-weight-bearing and weight-bearing exercise to strengthen the hip musculature; however, researchers have not examined relative differences in muscle activation during commonly used exercises. Information regarding these differences may provide clinicians with a scientific rationale needed for exercise prescription.

Methods and measures: Sixteen healthy subjects (mean +/- SD age, 27 +/- 5 years; range, 18-42 years; mean +/- SD height, 1.7 +/- 0.2 m; mean +/- SD body mass, 76 +/- 15 kg) volunteered for this study. Bipolar surface electrodes were applied to the right gluteus medius muscle. We measured muscle activation as subjects performed 3 non-weight-bearing (sidelying right hip abduction and standing right hip abduction with the hip at 0 degrees and 20 degrees of flexion) and 3 weight-bearing (left-sided pelvic drop and weight-bearing left hip abduction with the hips at 0 degrees and 20 degrees of flexion) exercises. Data were expressed as a percent of maximum voluntary isometric contraction of the right gluteus medius. Differences in muscle activation across exercises were determined using a 1-way analysis of variance with repeated measures, followed by a sequentially rejective Bonferroni post hoc analysis to identify differences between exercises.

Results: The weight-bearing exercises demonstrated significantly greater EMG amplitudes (P<.001) than all non-weight-bearing exercises except non-weight-bearing sidelying hip abduction.

Conclusion: The weight-bearing exercises and non-weight-bearing sidelying hip abduction exercise resulted in greater muscle activation because of the greater external torque applied to the hip abductor musculature. Although the non-weight-bearing standing hip abduction exercises required the least activation, they may benefit patients who cannot safely perform the weight-bearing or sidelying hip abduction exercises. Clinicians may use results from this study when designing hip rehabilitation programs.

Similar articles

See all similar articles

Cited by 26 articles

See all "Cited by" articles

LinkOut - more resources

Feedback