I have been jogging 45 minutes/3 miles on the treadmill daily. I generally start at one speed and gradually increase the speed by 0.1 mph per 5 minutes. The last few minutes, I up the speed every min. to 30 seconds, depending upon how I feel. By the end, I'm practically running. Should I be going at a steady speed the entire time or is increasing it the way I am doing fine? Also, should I be consuming more than 1400 calories or so per day running 3 miles daily, except for one day per week? I am 5'3", female, approx. 144-145 lbs.