摘要：on based of Kendall and his colleagues assumptions believed was a weakness in muscles of abdomen and femur extensor will be cause of pelvic anterior turn and also increase of lumbar arc (Kendall, 2005).But recent researches have doubt about the true of this subject the purpose of this study was to Comparison powers of couple force of anterior & posterior rotator's muscles in hyperlordosis and healthy male. 81 people were participated in this study (21/25± 1/70 years, 175/67± 5/89cm, 75/70± 6/27kg).A Dynamometers push &pull (power of back extensors, hip flexors& extensors and abdominal muscles) and a flexible ruler (arch lumbar) was used. Analyze statistically Results this study does with SPSS 18 and α= 0/05. Significant differences between powers of couple force of posterior rotator's muscles have observed (P<0/05). But we don’t have observed Significant differences between powers of couple force of anterior rotator's muscles (P>0/05) According to the results this study my be concluded that weakness of posterior rotation muscle in people with increased lumbar lordosis, which cause muscular imbalance in the area that probably to considering the weakness of posterior rotation muscle in people with increased lumbar lordosis or prescribe of reinforcement exercises to balance muscle strength in lumbar – pelvic belt area to help deformity correction in the lumbar region.
