i partially agree with that debaser, but all bodies train and grow differently, some people can train each body part twice a week and see good growth results, some people can only train each body part once a week to see results. personally, i train my bis, tris, chest, and shoulders twice a week on seperated days. then legs and back once a week. its just how i like to train and i like the results, no telling how the next person trains to get the results he wants. its all different.