jogging and 1 1/2 minutes of walking for a total of 20 minutes.
week 2 - alternate 1 1/2 minutes of jogging and 2 minutes of walking for a total of 20 minutes.
week 3 - jog 200 yards (or 1 1/2 minutes), walk 200 yards (or 1 1/2 minutes), jog 400 yards (or 3 minutes), and walk 400 yards (or 3 minutes). repeat.
week 4 - jog 1/4 mile (or 3 minutes), walk 1/8 mile (or 1 1/2 minutes), jog 1/2 mile or 5 minutes), walk 1/4 mile (or 2 1/2 minutes), jog 1/4 mile (or 3 minutes), walk 1/8 mile (or 1 1/2 minutes), and jog 1/2 mile (or 5 minutes).
week 