Nasal aspiration or huffin-puffin while heading toward technical area to manage? Many referees will need to address a situation that may bring additional heat, such as one that would involve a coach or manager or technical staff. Researchers have found that breathing through the nose affects emotional response or memory recall. Most instruction or guidance is to not sprint to the activity-site, I recall at least a couple of situations where the match inspector specifically asked not to and on inquiry why not, the response was so that you are not out of breath. Most referees are in good physical condition, so that point is moot. However, without going into amygdalas and hippcampi, here is one researcher providing data about breathing through the nose and mouth and the effect on memory and fear - and if you are still keen, here is a lighter read - http://bit.ly/2vXH3n5.