This condition, in turn, brings another possibility of the mat getting stained. Soiled uniforms or clothing shouldn't be left at the dojo to be worn time after time without washing. It is an unpleasant experience to work with a partner who is wearing a foul smelling gi. It also distorts one's sense of functional technique. Such an individual will think that an amazing amount of Ki is being extended because training partners are dropping like flies.
Personal hygiene is also a matter of courtesy.
It is by nature an issue of cleanliness. To be sure, rigorous and energetic training will result in heavy perspiration. This is healthy as it cleanses the system, moisturizes the skin and is the hallmark of a great workout. This should be sought after rather than avoided. In addition it is unlikely that this activity in and of itself will result in an unpleasant scent.