Relieve pain, prevent injury, and increase performance. Get customized mobility coaching developed by Dr. Kelly Starrett.
I had a similar problem where every morning i would wake up and my flexor hallicus would be tight, and sometimes my anterior tib would also be tight. both served to tighten up tissues around my ankle in the morning. subsequent mobility work pre-workout would loosen it up enough for a good workout to happen. but then it would repeat the next morning!