Analysing the Relationship between Gluteus Maximus Muscle Activity and Hamstring Muscle Length and its Influence on Sit to Stand Activity in Persons with Sacroiliac Joint Dysfunction
Keywords:Sacroiliac joint dysfunction, Gluteus Maximus, EMG activity, Hamstring muscle length, Active knee extension test
Background: The sacroiliac (SI) joint has been found to be a source of discomfort for 25 to 35% of people suffering
from persistent low back pain. Though the Gluteus Maximus and Hamstring muscles play a vital role in sit-tostand
activity in normal people, its role in individuals with sacroiliac joint dysfunction is yet to be studied.
Purpose: To assess the association between Gluteus Maximus activity and Hamstring muscle length and determine
the efficacy of Gluteus Maximus activation exercise and Hamstring muscle eccentric training on improving sit-tostand
activity in people with SI Joint dysfunction.
Materials and Methods: In the first phase of the study, Hamstring muscle length, Gluteus maximus muscle
activity, Pain during sit-to-stand activity was recorded. All thirty participants in the second phase of the study
underwent six weeks of Hamstring muscle eccentric exercise and Gluteus Maximus muscle activation exercise.
Results: A Pearson correlation test shows a positive correlation (r = 0.208) but the weaker relationship between the
variables. Paired t test analysis shows a significant improvement after the treatment in terms of Gluteus Maximus
muscle activity, Hamstring muscle length and pain reduction with a P value < 0.001.
Conclusion: This study concluded that Gluteus Maximus activation exercise and Hamstring muscle eccentric
training will significantly improve sit to stand activity and reduce pain.
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