Epr nutrition shaun t post workout recovery has been developed by shaun t himself he is the guy responsible for things like insanity hip hop abs and focus t25r epr nutrition shaun t post workout recovery has been designed to help restore glycogen levels that increase the rate of repairr when we train the most important part is the magic window the magic window is essential the bit where you muscles are at their weakest and need help repairing muscles are starving and are in need of nutri