Abstract
Introduction: Mechanical low back pain is acute or sub-acute in nature and doesn’t radiate below knee. Latissimus dorsi being the largest muscle of the back plays vital role in pathomechanics of mechanical low back pain.
Objectives: To establish prevalence of latissimus dorsi tightness in patients with active mechanical low back pain.
Materials and Methods: 100 subjects having active mechanical low back pain were selected. Prior to selection,subjects were assessed for tightness of pectoralis major, pectoralis minor and teres major. Subjects having positive test for these muscles were not included in sample size. Latissimus dorsi length test was then carried out using pressure biofeedback unit.
Result: The prevalence of latissimus dorsi tightness was studied based on side involvement, Ipsilateral involvement: 61%, Contralateral involvement: 12%, No involvement: 27%. Discussion: Studies conclude that alteration in trunk muscles occur to reduce noxious stimuli by limiting range of motion (1).A decrease in length or increase in stiffness of latissimus dorsi can lead to alterations in movement patterns and postures which cause exacerbation of low back pain.
Conclusion: There is a prevalence rate of 73% for latissimus dorsi tightness in active mechanical low back pain patients.