The aim of this research was to investigate the effect of 8-week low impact rhythmic aerobic(LIA) exercise on plasma fibrinogen concentration in older women. subjects were 23 healthyand enable to do physical activity old women of one of retirement homes. Subjects divided totwo groups including experimental (n=14) and control (n=11) and after 8 hours nightly fastingfor assessment fibrinogen 5cc blood sampling was derived from anterior vein. Afterwardexperimental groups were participated in LIA training program. Then all of measurementsreaped after 8 week training. . For present and post-test comparison between 2 groups; we wereuse software and paired t-test for comparison in each group and independent between groups.The results showed that 8 week LIA have significant effects on plasma fibrinogen level in olderwomen (p=0/02).