Sharyn O’Halloran is a professor of political economy and international and public affairs at Columbia University. A runner in her free time, Sharyn O’Halloran has completed an ultramarathon.

1. Tips for Ultramarathon Training
Sharyn O'Halloran

2. Introduction
 Sharyn O’Halloran is a professor of political economy and
international and public affairs at Columbia University. A runner
in her free time, Sharyn O’Halloran has completed an
ultramarathon.
Ultramarathons vary in length. Most begin at 50 kilometers,
and many are 50 miles or longer. Before they consider training
for an ultramarathon, runners should already be completing
weekly long runs of 15 to 18 miles.
Runner’s World offers a number of tips to help marathoners
train for an ultramarathon within 16 weeks. First, the magazine
recommends running on flat terrain, as long runs are hard
enough without adding hills. Second, runners should train on
similar terrain to the race: asphalt, trails, or a mix of the two.
Third, runners should incorporate breaks into their runs. They
should also run at a pace approximately 30 seconds per mile
slower than usual, and stop to eat and drink throughout the
run.