Abstract: The study was conducted to investigate the effect of aerobic exercise on improving health related physical fitness components of Dilla University sedentary female community .Twenty females from Dilla university sedentary female community were selected as study subjects and their age range were22-28 years. All Selected subjects were participated in moderate intensity aerobic exercise for 12 consecutive weeks, i.e.3 days per week 60 minute duration per day. Pre, during and post training tests were conducted on the components of health related physical fitness variables The data collected from the study subject was analyzed using SPSS version 16 software.