Abstract
BackgroundProne hip extension (PHE) is a common and widely accepted test used for assessment of the lumbo-pelvic movement pattern. Considerable increased in lumbar lordosis during this test has been considered as impairment of movement patterns in lumbo-pelvic region. The purpose of this study was to investigate the change of lumbar lordosis in PHE test in subjects with and without low back pain (LBP).MethodA two-way mixed design with repeated measurements was used to investigate the lumbar lordosis changes during PHE in two groups of subjects with and without LBP. An equal number of subjects (N = 30) were allocated to each group. A standard flexible ruler was used to measure the size of lumbar lordosis in prone-relaxed position and PHE test in each group.ResultThe result of two-way mixed-design analysis of variance revealed significant health status by position interaction effect for lumbar lordosis (P < 0.001). The main effect of test position on lumbar lordosis was statistically significant (P < 0.001). The lumbar lordosis was significantly greater in the PHE compared to prone-relaxed position in both subjects with and without LBP. The amount of difference in positions was statistically significant between two groups (P < 0.001) and greater change in lumbar lordosis was found in the healthy group compared to the subjects with LBP.ConclusionsGreater change in lumbar lordosis during this test may be due to more stiffness in lumbopelvic muscles in the individuals with LBP.
Highlights
Prone hip extension (PHE) is a common and widely accepted test used for assessment of the lumbo-pelvic movement pattern
Greater change in lumbar lordosis during this test may be due to more stiffness in lumbopelvic muscles in the individuals with low back pain (LBP)
The results of this study indicate an increase in the size of lumbar lordosis during PHE compared to prone-relaxed position regardless of health status
Summary
Prone hip extension (PHE) is a common and widely accepted test used for assessment of the lumbo-pelvic movement pattern. Considerable increased in lumbar lordosis during this test has been considered as impairment of movement patterns in lumbo-pelvic region. The purpose of this study was to investigate the change of lumbar lordosis in PHE test in subjects with and without low back pain (LBP). Low back pain (LBP) is a world-wide health problem and the most common and pricey musculoskeletal disorder in the today’s societies [1, 2]. With regard to this point of view, repetitive movements and long-term incorrect postures and movements can change muscle tissue characteristics and can lead to muscle dysfunction, altered movement pattern, pain and movement disorders [5]. The main emphasis has been recently placed on assessment of the changed movement pattern in patients with musculoskeletal pain and disorders such as LBP and on the important of achieving normal pattern of the movement for the prevention and treatment of LBP [7,8,9,10,11]
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