This message is being spammed at me for both, stable and experimental version of the game. however, i can still run at full speed and see no impact on gameplay, except an occasional groan from my character.
on stable branch, it started when i broke my leg and fixed it with a stick & bandage. i really should limp right now, instead i am still able to sprint from town to town.
on experimental branch, it started when i ran through my first pair of shoes (it currently takes less then half an hour to go from pristine to ruined), my feet started to hurt and soon after also my leg. not sure what running with broken shoes will do with your leg. but still no impact here either.
please, either remove the message or change game mechanics, because right now it's just annoying and distracting. or maybe that's the whole point?