Informed consent and disclosing necessary information is a right that all patients have. They have the right to ask what they are receiving and the treatments they are undergoing. Now, when situations arise where information such as where antibodies come from, it might be appropriate to provide a vague but informative response to the client. However, still in the basis of truth, just that to protect the client from unnecessary anxiety it might be best to provide a slight vague but honest reply.
Because regular exercise helps your body tissue do a better job at pulling oxygen from your blood which will allow you to work better under stress and you don't get winded as easily.