Personal trainers have a lot to dislike about gym members - their vanity, their lack of commitment, their complaining - but one of the most offensive characteristics of gym clients is that they can have bad breath, according to the Phoenix New Times.
Exercising naturally involves some body odors. Sweat contains hormones and fats that combine to cause the sour smell of perspiration. It also contains propionic acid, according to Medical News Today, a compound that the nose associates with a vinegar-like odor.
According to the news source, halitosis can also be a big problem in the gym. Trainers often ask trainees to breath deeply and regularly, often while face to face. These exhalations can release the sulfuric compounds that constitute most bad breath.
Furthermore, exercise can be the cause itself. Much oral odor comes from a dry mouth, which gives oral anaerobic bacteria a fertile growing environment. On a dry tongue and palate, these microorganisms multiple and release sulfur-based molecules that leave a real stink.
What can dry your mouth out at the gym? Simply working out - it encourages heavy breathing and uses the body's stores of moisture. To treat bad breath before or after a workout, individuals may rinse with a specialty breath freshener, particularly those that neutralize odor molecules.