That is just unrealistic ? Some days you just feel down and are barely able to function, others you have seemingly unlimited energy, and this can come from a

That is just unrealistic ? Some days you just feel down and are barely able to function, others you have seemingly unlimited energy, and this can come from a whole host of factors : how did you sleep, what did you eat, what is the weather, how is your personal life going... And of course things get worse as you age (with quite a lot of variation and personal responsibility in staying healthy).