diff --git a/code/__DEFINES/mobs.dm b/code/__DEFINES/mobs.dm
index 48962d2c..1669f4f9 100644
--- a/code/__DEFINES/mobs.dm
+++ b/code/__DEFINES/mobs.dm
@@ -173,7 +173,7 @@
 //Math stuff for fatness movement speed
 #define FATNESS_DIVISOR 860 
 #define FATNESS_MAX_MOVE_PENALTY 4
-#define FATNESS_WEAKLEGS_MODIFIER 20
+#define FATNESS_WEAKLEGS_MODIFIER 35
 #define FATNESS_STRONGLEGS_MODIFIER 0.5
 
 //Nutrition levels for humans
diff --git a/code/datums/traits/negative.dm b/code/datums/traits/negative.dm
index f3006c37..dc13d40d 100644
--- a/code/datums/traits/negative.dm
+++ b/code/datums/traits/negative.dm
@@ -517,3 +517,11 @@ GLOBAL_LIST_EMPTY(family_heirlooms)
 /datum/quirk/flimsy/remove() //how do admins even remove traits?
 	if(quirk_holder)
 		quirk_holder.maxHealth += healthchange
+
+/datum/quirk/weak_legs
+	name = "Weak Legs"
+	desc = "Your legs can't handle the heaviest of charges. Being too fat will render you unable to move at all."
+	mob_trait = TRAIT_WEAKLEGS
+	value = -1
+	category = CATEGORY_SEXUAL
+	medical_record_text = "Patient's legs seem to lack strength"
diff --git a/code/datums/traits/neutral.dm b/code/datums/traits/neutral.dm
index ad7615c8..a5cdf67b 100644
--- a/code/datums/traits/neutral.dm
+++ b/code/datums/traits/neutral.dm
@@ -153,14 +153,6 @@
 	category = CATEGORY_SEXUAL	//Any better place to put it? Doesn't really affect gameplay
 	medical_record_text = "Patient cares little with or dislikes being touched."
 
-/datum/quirk/weak_legs
-	name = "Weak Legs"
-	desc = "Your legs can't handle the heaviest of charges. Being too fat will render you unable to move at all."
-	mob_trait = TRAIT_WEAKLEGS
-	value = 0
-	category = CATEGORY_SEXUAL
-	medical_record_text = "Patient's legs seem to lack strength"
-
 /datum/quirk/SpawnWithWheelchair
 	name = "Mobility Assistance"
 	desc = "After your last failed fitness test, you were advised to start using a hoverchair"
diff --git a/code/modules/mob/living/carbon/human/species.dm b/code/modules/mob/living/carbon/human/species.dm
index 0387e437..2cc03c19 100644
--- a/code/modules/mob/living/carbon/human/species.dm
+++ b/code/modules/mob/living/carbon/human/species.dm
@@ -1867,8 +1867,12 @@ GLOBAL_LIST_EMPTY(roundstart_races)
 				fatness_delay = fatness_delay * FATNESS_STRONGLEGS_MODIFIER
 
 			fatness_delay = min(fatness_delay, FATNESS_MAX_MOVE_PENALTY)
-			if(HAS_TRAIT(H, TRAIT_WEAKLEGS) && (H.fatness > FATNESS_LEVEL_BLOB))
-				fatness_delay += ((H.fatness - FATNESS_LEVEL_BLOB) * FATNESS_WEAKLEGS_MODIFIER) / FATNESS_DIVISOR	
+			if(HAS_TRAIT(H, TRAIT_WEAKLEGS))
+				if(H.fatness <= FATNESS_LEVEL_IMMOBILE)
+					fatness_delay += fatness_delay * FATNESS_WEAKLEGS_MODIFIER / 100
+				if(H.fatness > FATNESS_LEVEL_IMMOBILE)
+					fatness_delay += (H.fatness / FATNESS_LEVEL_IMMOBILE) * FATNESS_WEAKLEGS_MODIFIER
+					fatness_delay = min(fatness_delay, 60)
 	
 			. += fatness_delay