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Title Physically Active Young Adults are More Susceptible to Decreased Salivary Flow Rate and Dental Erosive Wear Than Sedentary Young Adults
Clinical Question Are healthy young adults who have a sedentary lifestyle more susceptible to decreased salivary flow than those who engage in regular exercise?
Clinical Bottom Line Physically active young adults are more susceptible to decreased salivary flow rate than sedentary young adults. Decreased salivary flow was shown to lead to increase in dental erosive wear in physically active young adults.
Best Evidence (you may view more info by clicking on the PubMed ID link)
PubMed ID Author / Year Patient Group Study type
(level of evidence)
#1) 22443448Mulic/2012 220 adults 18-32 years old 104 Participants engaging in exercise twice or more per week for 60-90 minutes 116 participants engaging in no regular exerciseCase Control Study
Key results64% (n=45) of the individuals had reduced stimulated salivary flow following exercise, and 36% had an increased stimulated salivary flow. The mean value before exercise was 1.43 ml/min (SD .09) while the mean value after training session was 1.31 ml/min (SD.08). Of those with reduced stimulated salivary flow rate after exercise (n = 45), 36% showed erosive wear, while only 9% of participants with increased salivary flow (n=25) had erosive lesions (p < 0.01). A greater number of participants with erosive wear showed decreased salivary flow during exercise when compared with the non-erosion group (p < 0.01). 64% of the exercising participants showed dental erosive wear as opposed to 20% of the comparison group.
Evidence Search ("exercise"[MeSH Terms] OR "exercise"[All Fields]) AND (salivary[All Fields] AND flow[All Fields]) AND "loattrfree full text"[sb]
Comments on
The Evidence
Validity: This a Case-control study involving 220 adults between 18-32 years of age. Groups were treated the same and sample size calculations were performed prior to initiating the study. The examination was performed at the fitness-center or at a dental clinic (comparison group), using tested erosive wear system (VEDE). Saliva sampling (unstimulated and stimulated) was performed before and after exercise. Compliance was adequate and a questionnaire was provided for each participant. Recall bias was not assessed and there was no competing interest. Perspective: This study demonstrates the relationship of physical activity in young adults and decreased salivary flow rate. However, saliva samples were only taken from 70 participants, which could have influenced the outcome. The subjects were representative of a large age group and no potential harm came from this study. The clinical significance of this study is relevant, but more in depth studies could be made to show the differences between the salivary flow rates of the exercise group and the comparison group. The outcomes of this study were consistent with previous research in these areas.
Applicability This study is applicable for identifying the relationship between physical exercise, dental erosive wear, and salivary secretion in young adults ages 18-32.
Specialty/Discipline (General Dentistry) (Periodontics) (Basic Science)
Keywords Exercise, Salivary flow, Dental erosive wear
ID# 2869
Date of submission: 03/27/2015spacer
E-mail hollowayl@livemail.uthscsa.edu
Author Lizanne Holloway
Co-author(s) e-mail
Faculty mentor/Co-author Georgiana S. Gross, MPH
Faculty mentor/Co-author e-mail grossg@livemail.uthscsa.edu
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