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Background and aim: The aim of this study was to verify the relationship between pelvic tilt and lumbar lordosis with muscle tightness, muscle strength, BMI, and age in standing position.

Material and methods: In this study, 75 healthy female subjects participated with age range 20-70 years, mean (SD) = 40.66 (13.69). Pelvic tilt and lumbar lordosis were measured in standing position with pelvic inclinometer and flexible ruler respectively. The length of muscles, including: erector spinae, iliopsoas, rectus femoris, hamstrings, tensor fascia lata & ilio tibial band, and gastrocnemius were assessed by Schober, Thomas, Ely, 90/90 SLR, Ober tests and passive dorsiflexion of foot, respectively. The strength of muscles, including: rectus abdominis, transversus abdominis, left & right obliqus, Gluteus maximums & medius, and quadriceps were evaluated by manual muscle tests.

 Results: The relationship between pelvic tilt and lumbar lordosis with muscle strength, BMI, and age was poor. Muscle tightness and muscle strength had no significant effect on pelvic tilt and lumbar lordosis.

Conclusion: The results of this study indicated that the evaluated variables including: pelvic tilt and lumbar lordosis, have poor correlation with muscle tightness, muscle strength, BMI, and age. 

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Background and Aim: According to the attachments lumbar spine and pelvic muscles, it seems that pelvic tilt and lumbar lordosis have previous studies about this relationship have shown different results and these conflicting results can hamper therapist to set a correct therapeutic plan. The aim of this study was to examine this relationship in a large sample and with more accurate instruments. Materials and Methods: One hundred and eighty healthy women (20-65 year-old) with a mean age of 41.45 12.27 participated in this study. Pelvic tilt was measured by inclinometer and lumbar lordosis by flexible ruler. Statistical tests have been performed by SPSS (version 11.5) computer software. Results: The results of this study showed a weak correlation between pelvic tilt and lumbar lordosis (r =0.16, p<0.05). This association was little affected by age. Conclusion: This study has examined the relationship between pelvic tilt and lumbar lordosis of healthy women in static position. The present study showed a weak correlation between pelvic tilt and lumbar lordosis in healthy women.