Puagprakong P., Earde P., Kooncumchoo P.,"Lumbo-Pelvic-Hip Angle Changes During Upright and Free Style Sitting in Office Workers with Lower Crossed Syndrome.", Apr. 2021, p. 532-538.
Lower crossed syndrome (LCS) is an imbalance of muscles in the lower body segment. Muscle imbalance with prolonged sitting may increase the risk of low back pain. The objective of this study was to study the lumbo-pelvic-hip angle in upright and freestyle sitting in healthy and LCS individuals. Thirty office workers (normal = 10, LCS type A = 10, and LCS type B = 10) who worked 6–8 h./d in a sitting posture were recruited. Lumbo-pelvic-hip angle was recorded while participants typed a text for 30 min in upright and freestyle sitting. Two-ways mixed model ANOVA and post-hoc Turkey test were used to analyze data. Decreased lumbar lordosis was found among the three groups. However the LCS type A group maintained their lumbar lordosis and anterior pelvic tilt, while lumbar kyphosis and posterior pelvic tilt were found in LCS type B in both sittings.