today I decided to change it up a bit. I started on the tm. 10 degree incline at 3.0 mph ( walking ) for the first 5 min then changed to 0.0 incline and 4.0 mph for the next 5 min ( light jog ). And then so on and so on for 30 minutes. My hr stayed between 122 and 132 for the entire time. My only ques is I only burned 225 calories. If I do the entire routine walking at 10 deg. @3.0 mph I burn 300cals. what should I do? Im 38, 5'7 and 187 looking to get a little leaner for summer (180lbs would be great). I also do cardio 5X/week w/good diet.