T Nation

myostat blocking

ok when is the myostat protein released: during the muscle breakdown phase AND OR during the muscle rebuilding phase?

I would think all the time, 24/7/365.

Actually the myostatin is active during the rebuilding stage. The satelite cells attach to the partially torn muscle fibers to rebuild them. Myostatin prohibits these cells from overduring it. When muscle fibers are damaged through exercise the cells travel to the damaged area and begin a process of cell division to help repair, by fusing to the fiber. In theory by binding the myostatin the cells should be able to fuse for a longer period of time and develop more cells, causeing increase in size and strengh.