For the Trail Making Test Part A , scores in the diet-exercise group ( -@ @ ) improved more than in the control group ( -@ @ ) ( P = @ ) ; a similar finding was observed for the Trail Making Test Part B. Scores on the IWQOL improved more in the diet ( @ @ ) , exercise ( @ @ ) , and diet-exercise ( @ @ ) groups than in the control group ( @ @ ) ( P = @-@ @ ) ; scores in the diet-exercise group improved more than in the diet group but not more than in the exercise group .