Abstract
Background Occupational standing is associated with low back pain (LBP) development. Yet, trunk and gluteus-medius muscles9 fatigability has not been extensively studied during occupational standing. This study examined and correlated the rectus abdominus (RA), erector-spinae (ES), external oblique (EO), and gluteus-medius (GM) muscles9 fatigability on both sides while standing in a confined area for 30 min. Methods Median frequency EMG data were collected from 15 female clinical instructors with chronic LBP (group A) and 15 asymptomatic controls (group B) (mean age 29.53±2.4 vs 29.07±2.4 years, weight 63.6±7 vs 60±7.8kg, and height 162.73±4 vs 162.8±6 cm respectively) using a spectrum analysis program. Data were collected in the first and last 5 min of the standing task. Results Using Mixed three-way ANOVA, groupA showed significantly (p Discussion/Conclusions Clinical instructors with LBP are more liable to have higher trunk and gluteus-medius muscle fatigue than asymptomatic individuals. Thus, endurance training for these muscles should be included in the rehabilitation of such patients.Key words: Fatigability, Trunk, Gluteus-medius, EMG, Standing, LBP
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