Journal of Back and Musculoskeletal Rehabilitation 28 (2015) 591–597 591 DOI 10.3233/BMR-150585 IOS Press Effects of William training on lumbosacral muscles function, lumbar curve and pain Rouholah Fatemi a , Marziyeh Javid a,∗ and Ebrahim Moslehi Najafabadi b a Department of Physical Education, Dehdasht Branch, Islamic Azad University, Dehdasht, Iran b Department of Physical Education, Payamnoor University, Iran Abstract. BACKGROUND: There are many types of treatments and recommendations for restoring back deformities depending on doc- tors’ knowledge and opinions. The purpose of the exercises is to reduce pain and to ensure stability of the lower trunk by toning the abdominal muscles, buttocks and hamstrings. Given the duration of flares and relapses rate, it is important to apply an efficient and lasting treatment. OBJECTIVE: To evaluate the effects of 8 weeks of William’s training on flexibility of lumbosacral muscles and lumbar angle in females with Hyperlordosis. METHODS: Forty female students with lumbar lordosis more than normal degrees (Hyperlordotic) that were randomly divided into exercise and control groups were selected as the study sample. The lumbar lordosis was measured using a flexible ruler, flexibility of hamstring muscles was measured with the active knee extension test, the hip flexor muscles strength was measured using Thomas test, the lumbar muscles flexibility measures by Schober test, abdominal muscles strength measured by Sit-Up test and back pain was measured using McGill’s Visual Analogue Scales (VAS) questionnaire. Data were compared before and post-test using independent and paired t-testes. RESULTS: Results showed that 8 weeks of William’s exercise led to significant decreases in lumbar angle and back pain, increases in flexibility of hamstring muscles, hip flexor muscles flexibility, lumbar extensor muscles flexibility and abdominal muscles strength. CONCLUSION: The findings show that William’s corrective training can be considered as a useful and valid method for restoring and refining back deformities like as accentuated back-arc and became wreaked muscles’ performance in lumbar areas. Keywords: Lumbar angle, flexibility, hyperlordosis, William’s training 1. Introduction According to the literatures, the prevalence of back pain appeared to be higher among girls than boys [1]. One of the most common causes of back pain is spinal curve change in the waist. Lumbar lordosis is one of the most important parts of the spinal pillar that has a special importance due to the unique position and having a direct contact with the pelvis. It should be * Corresponding author: Marziyeh Javid, Department of Phys- ical Education, Dehdasht Branch, Islamic Azad University, De- hdasht, Iran. Tel.: +98 938 109 3679; Fax: +98 757 311 4838; E-mail: javid.m65@gmail.com. paid special attention to the spine in order to have good physical condition [2]. In addition to the bones, liga- ments, muscles and disks vertebra have also key role in lordos formation. Without muscles action, pelvic gir- dle performance hasn’t sufficient stability [3]. Youdas (1996) found no relationship between the level of pelvic inclination and the degree of lumbar lordosis in a standing position [4]. Central stabilize of the vertebral column is sup- ported by special muscles such as multifidus, transver- sus abdomin and internal muscles in trunk. These mus- cles act late in patients suffered from hyperlordosis [5]. The muscles provide stability of vertebrae in a fo- cal form [3]. Weakness in any of the muscles of the lumbar-pelvic belt can follow pelvic rotations and di- ISSN 1053-8127/15/$35.00 c  2015 – IOS Press and the authors. All rights reserved