What happens to your mouth when you exercise and why is saliva so important? Watch Dr Guy Carpenter, Reader in Oral Biology, at Kings College London Dental Institute, discuss. Image and video credit: By Pavel L (http://shutr.bz/2aQfjdb) via Shutterstock. By Pavel L (http://shutr.bz/2azF255) via Shutterstock. By VIA Films (http://shutr.bz/2aIpZrN) via Shutterstock. https://en.wikipedia.org/_/Athletics_... https://commons.wikimedia.org/_/File:... By nicoleleec (https://flic.kr/p/8dAy3H) via Flickr. Music Credit: Comfortable Mystery 2 by Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/b...