For the Trail Making Test Part A , scores in the diet-exercise group ( -11.8 1.9 ) improved more than in the control group ( -0.8 1.9 ) ( P = 0.001 ) ; a similar finding was observed for the Trail Making Test Part B. Scores on the IWQOL improved more in the diet ( 7.6 1.6 ) , exercise ( 10.1 1.6 ) , and diet-exercise ( 14.0 1.4 ) groups than in the control group ( 0.3 1.6 ) ( P = 0.0001-0 .03 ) ; scores in the diet-exercise group improved more than in the diet group but not more than in the exercise group .