One of the best things to do to build up your endurance is run! Some things you might want to try is running a mile or 2 in the morning, then take a break and eat a good, healthy lunch, then get back to it in the evening for another mile or 2. Below is an endurance training routine to help you build up your endurance.

6-7 a.m.- Eat Breakfast
7-8 a.m.- Jog/Run 1-2 miles
9-10 a.m.- Get a snack and relax
11-1 a.m./p.m.- Eat lunch and get ready to run again
2-3 p.m./ Jog/Run 1-2 miles
After your done running rest up and get ready for tomorrow...

It is very important to fill up when your eating. WARNING..this does not mean stuff yourself during your meals.