Abduction Strength Deficiency: How Common, How Early and How Amendable?
Gluteus medius strength deficiency has been linked to various injuries of the lower limb (Fairclough et al., 2007, Bullock-Saxton et al., 1993, Powers et al., 2003, Williams and Cohen, 2009). However there is limited information in the literature about the prevalence of this condition among healthy individuals. When observing peoples’ walking patterns, it is common to see excess side to side movement indicative of abduction strength deficiencies. However the conventional dynamometry strength testing generally show normal results despite the person having an abnormal gait pattern and the conventional exercise used to treat this condition is not yet proven to be effective. A recently published study on Australian Rules footballers suggested that hip abduction weakness does occur in healthy people when a previously unpublished test was used. It uncovered the weakness and using the same position as an exercise was capable of correcting it (Osborne et al., 2012). The current study investigated the testing position against conventional testing positions and the exercise against conventional exercises. This study also investigated the possibility of growth related hip abduction strength deficiency in high school aged males.Three studies were used to investigate the new testing position and exercise. An observational study among 101 healthy adults was completed to investigate the prevalence of hip abduction strength deficiency and compare the new hip abduction testing position to conventional hip abduction testing positions. An interventional study was completed to investigate the effects of the new abduction exercise against a conventional abduction exercise and an adduction exercise as controls. This study involved three 1st XV rugby teams with a intervention period of two months. The third study was also an observational study involving 105 high school students. This study investigated the prevalence of abduction strength deficiency in relation to growth among high school aged males. In the study involving healthy adults, it was found that people tested the weakest in the new testing position. When the new hip abduction exercise was compared to conventional hip abduction exercises and an addcution exercise as a control, there were no significant strength improvements. The third study also found no hip abduction strength deifciency realted to growth among high school aged males.The recently published testing position may be a useful tool in uncovering hip abduction strength deficiency but as an exercise it did not produce any significant strength gains. Although a recently published study on Australian Rules Footballers suggested that hip abduction strength deficiency may occur due to growth (Osborne et al., 2012), this study suggested there were no growth related hip abduction strength deficiency.
Advisor: Osborne, Hamish
Degree Name: Bachelor of Medical Science with Honours
Degree Discipline: Department of Medicine
Publisher: University of Otago
Keywords: Sports; Medicine
Research Type: Thesis