How bad is it to sleep in increments?

work out for an hour first thing in the morning, from 7 til 8 . If that wont work, get up at six and work out from 6 til 7. Do it seriously and consistently for a week, solid. If you FEEL like napping during the day or around 4 do a quick light workout, 20 to 30 minutes, just enough to get the heart rate up. After a month, you'll be able to vary the intensity of your morning workout to eliminate the nap/mid day workout, and pick a consistent bed time.