Specifically, cardiorespiratory endurance refers to the ability of the heart, lungs and circulatory system to deliver oxygen to working muscles for sustained periods of time.
The ego is  your consciousness of your own identity, or the conscious mind. Basically, your ego is related to your confidence level; if you have a big ego, your confidence is high, and visa versa. Additionally, having an ego can mean having an inflated feeling of pride or self-worth. The ego is your consciousness of your own identity, or the conscious mind. Basically, your ego is related to your confidence level; if you have a big ego, your confidence is high, and visa versa. Additionally, having an ego can mean having an inflated feeling of pride or self-worth.
The ego has no concept of right or wrong; something is good simply if it achieves its end of satisfying without causing harm to itself or the id. Often the ego is weak relative to the headstrong id, and the best the ego can do is stay on, pointing the id in the right direction and claiming some credit at the end as if the action were its own. Freud made the analogy of the id being a horse while the ego is the rider.