question: Hi, I am currently undergoing a Personal Training Qualification.  Out of interest I decided just to have a try of the equipment and noted a normal Systolic of 120 with a low diastolic of around 52.  I have taken this again today and note that I was 128/52.  I consider myself to be exteremely fit and wonder if this is the reason why the diastolic is so low.  Sometimes no knowledge is better a little knowledge and I start imaging things.  Thanks