Any time sprint as a gameplay mechanic in Halo is brought up, people endlessly parrot the "Spartans can sprint in the books" excuse. I've read a few of the Halo novels, but there's a lot about the expanded universe that I should definitely learn about. So, can Spartans not run and shoot at the same time in the lore? That sounds like a pretty big oversight to me, so how could the UNSC be so stupid after five hundred years of technological advancement?
Can Spartans not run and shoot at the same time?