Hills
Start the hill workouts by doing a few easy hills that don't
put a lot of stress on your legs. Gradually add more resistance
by increasing length and grade. By the final weeks you should
be able to do the entire length of the run over hills. The longer
the hills, the better.
Multiple Workouts
There are several days that include multiple workouts in one
day. This is designed to simulate running 3 legs over 24-hours.
You may also try running at night and at high altitude.
Food and Hydration
While training you should practice re-hydrating and eating as
if you were actually running a relay. Choose replacement drinks
and foods that are easily managed by your stomach: high in carbohydrates,
easily digestible, and easily transportable.