Just to recap for newcomers and those whose lives do n't revolve around me - I have a heart condition that causes me to get more tired , more easily , than most . I know 80 year olds with more energy than me . Add to the heart condition the fact that one of my lungs is n't connected to my heart ( no oxygenated blood delivered from it ) .
According to the above context, answer the following question.
Why is this person always more tired than most other people he is around ?


He has a few medical issues with this heart and lung .