What do the different phases represent?
Different things to different people. If the physical rhythm is in a high phase, for instance, you might experience more physical ability then if that rhythm was in a low phase. An emotionally low rhythm might be categorized as a sleepy or even irritable emotional state, likewise, in an emotional high there could be an improved sense of well-being. Intellectually, a high might explain the ability have more focus or mental clarity. In an intellectual low there could be more mental fuzz.