“You’re talking months of training,” she said. “Basically building up your cardio, strengthening your heart. And diet plays a huge part of it as well. It’s definitely not a one-month prep.”

To run this far in such a short amount of time, Mudge said a diet high in carbs and electrolytes is important.

She knows of people who run 20 miles a day, but rarely two days in a row. However, she said, “It’s doable with appropriate preparation.”

Solomon hasn’t trained specifically for this run, he said, but he is a member of West Point’s Sandhurst Team, which competes with cadets from other countries in running, navigation, marksmanship, water movements and other military tasks. They do this while wearing flak jackets and helmets and carrying rucksacks.

“I know of many veterans and military people who have done this,” said Freddi Carlip, editor and publisher of Runner’s Gazette, based in Lewisburg. “It’s a great thing to do. It is certainly an accomplishment.” Those who run these distances are “super fit,” she said.

“Ultra runners,” as she calls them, aren’t running very fast, and take many more breaks. “It’s not like running a marathon,” she said.

These runners have to stop to eat and drink to replenish their energy and nutrients. “You’ll burn up all that high energy source right away,” Mudge said. Throughout the run, they need to “crank those electrolytes and hydration levels in their bodies as well,” she said.