sprint stamina stuff

modular_citadel/code/modules/mob/living/carbon/damage_procs.dm

@@ -18,3 +18,21 @@
 	if(recoveringstam && amount > 20)
 		incomingstammult = max(0.01, incomingstammult/(amount*0.05))
 	return amount
+
+/mob/living/carbon/doSprintLossTiles(tiles)
+	doSprintBufferRegen(FALSE)		//first regen.
+	if(sprint_buffer >= 1)
+		var/use = min(tiles, sprint_buffer)
+		sprint_buffer -= use
+		tiles -= use
+	if(!tiles)		//we had enough, we're done!
+		return
+	adjustStaminaLoss(tiles * sprint_stamina_cost)		//use stamina to cover deficit.
+	update_hud_sprint_bar()
+
+/mob/living/carbon/proc/doSprintBufferRegen(updating = TRUE)
+	var/diff = world.time - sprint_buffer_regen_last
+	sprint_buffer_regen_last = world.time
+	sprint_buffer = min(sprint_buffer_max, sprint_buffer + sprint_buffer_regen_ds * diff)
+	if(updating)
+		update_hud_sprint_bar()

modular_citadel/code/modules/mob/living/carbon/human/human_movement.dm

@@ -5,7 +5,7 @@
 	var/oldpseudoheight = pseudo_z_axis
 	. = ..()
 	if(. && sprinting && !(movement_type & FLYING) && canmove && !resting && m_intent == MOVE_INTENT_RUN && has_gravity(loc) && !pulledby)
-		adjustStaminaLossBuffered(0.3)
+		doSprintLossTiles(1)
 		if((oldpseudoheight - pseudo_z_axis) >= 8)
 			to_chat(src, "<span class='warning'>You trip off of the elevated surface!</span>")
 			for(var/obj/item/I in held_items)

modular_citadel/code/modules/mob/living/carbon/life.dm

@@ -0,0 +1,2 @@
+/mob/living/carbon/Life()
+	doSprintBufferRegen()