The Scandinavian Journal of Medicine and Science in Sports published an interesting study in 2013, but they had no definitive reason why this was occurring. The active athletes experienced a mouthfull of dental problems, including tooth decay, corrosion,and other oral problems like gum disease.
Can this be true? Health experts push so strenuously for the public to exercise every day, how can it be a detriment to dental health? The following year, the University of Heidelberg in Germany performed a study to better explain why these Olympic athletes had such a bad dental reviews.
They recruited 35 triathlon athletes and 35 healthy adults as the test group. The atheltes exercised 9 hours a week compared with the other half that did not exercise. What the study determined was that at a certain point in the endurance training, the composition of the saliva in the athletes mouth changed and it contained more alkaline.
Alkalinity is known to eat away at the tooth enamel promoting tooth decay. It also leads to mouth sores and gum disease, so the added alkalinity in the saliva explains the poor dental health of the Olympic athletes. This is only a minimal amount of research, so look for more studies.