The study was aimed at evaluating the effect of exercise of the various physical characteristics of saliva like salivary flow, pH and viscosity. Saliva has a protective function on teeth. After an intense workout, there are various changes in saliva: hormonal molecular and physical, which can be evaluated to reveal the change in salivary composition and nature which may predispose to plaque development and dental caries. 30 healthy people, picked randomly, had an intense workout in the gym, for half an hour. Saliva was collected before and after exercise, and tested for the three parameters, namely, salivary flow, pH and viscosity. The time for salivary flow ( t test) increased after exercise, the pH (t test) was decreased and the results were not statistically significant for the viscosity of the saliva (chi square tests).