Stamina

Stamina is consumed when you sprint. Run for too long and you might run out of it, disabling you from sprinting any longer. At very low stamina levels, your character will pant with exhaustion.

The Stamina gauge is slowly refilled over time when your character is not sprinting or crouching, and can be replenished using certain consumables like Adrenaline Syringe.

You will be able to regenerate stamina when standing still. The best and fastest way to regenerate Stamina is by crouching.