Effects of combined exercise on body composition, blood pressure and arteriosclerosis index of pre-hypertensive middle-aged females This research is to examine the effect of combined exercise on changes in pre-hypertensive body composition, blood pressure and arteriosclerosis index. For this research experiment, pre-hypertensive (systolic blood pressure 121~139mmHg) females in their 50s were grouped into an exercise group (n=22) and control group (n=22). They followed a combined exercise program (aerobic exercise (30 minutes) and circuit exercise (30 minutes)) 3 times a week for 6 months. The combined exercise helped reduce bodyweight, body fat amount, body fat rate and waist size to a significant extent. The combined exercise helped lower systolic blood pressure to a significant extent. The combined exercise application significantly reduced TC/HDL-cholesterol ratio, TG/HDL-cholesterol ratio, and LDL-C/HDL-cholesterol ratio. The combined exercise is applicable to pre-hypertensive women in their 50s as a useful exercise program.