For both fans and first - timers, here are a few tips and tricks that you might find useful, including how to earn extra experience points and unlock infinite stamina for sprinting. (techtimes.com)
The Exo Suits will give infinite stamina once equipped and provide a huge boost to the player's power, letting them grab and smash zombies or other objects as they see fit. (gearnuke.com)
There is actually a hidden way to unlock infinite stamina, and that is by letting go of the sprint button just as the stamina bar is about to become depleted, and then holding down the button again a split second afterwards. (techtimes.com)