You are able to utilize your limit breaks even after receiving healing that would place you out of critical condition.
Prerequisite: Endurance feat.
Once you are brought to 50% or less hit points and receive healing that would bring you above 50%, you can still utilize your limit breaks until the end of your next turn.
This feat does not stack with the Group Limit Break feat.
Normal: You must be at or below 50% hit points on your turn at the time of the action to utilize a limit break.