I am assuming here that most of you live in a semi-detached - maybe some in a detached - house with a bathroom and toilet on the upper floor. So I have some questions. Take your time and consider very closely the following questions.
When you go upstairs do you bend your body or do you walk upright? Do you pull yourself up by using the handrail?
How do you breathe? Do you breathe on every step? Do you continue breathing normally? Or do you hold your breath until you reach the top step? Answers on a first-class stamp.