There also appears to be a variationin myostatin levels depending on when samples were obtainedpostexercise. Some studies have observed increased orunchanged myostatin levels soon after exercise but reducedlevels when checked again days later
Myostatin - The Holy Grail for Muscle, Bone, and Fat? (PDF Download Available). Available from: https://www.researchgate.net/publication/257135787_Myostatin_-_The_Holy_Grail_for_Muscle_Bone_and_Fat [accessed Apr 26, 2016].