The purpose of this study was to assess the effects of hydration status on orthostatic vital signs and the baroreceptor response following an inversion table test in both endurance-trained individuals and sedentary individuals. The study consisted of two different groups of women: sedentary and aerobically fit. The sedentary group had five women who reported rarely exercising. The fit group consisted of five women who participate in endurance training, either running or swimming, at least three days a week. The independent variables were the degree of inversion and time between vital sign measurements. The dependent variables included the values for the individuals’ heart rate and blood pressure, as well as self-reported symptoms of syncope, during inversion. These values were measured at rest and every thirty seconds while inverted. During the first trial, the subjects fasted for at least three hours before two minutes of inversion. Immediately after the first trial, the subjects drank a 16 oz. bottle of water over a ten minute span. After hydration, the subjects completed another two minutes of inversion. It was hypothesized that the endurance-trained subjects would experience less change from baseline in heart rate and blood pressure than the sedentary individuals during both the hydrated and dehydrated trials. It was also hypothesized that heart rate and blood pressure of all subjects would change less during the hydrated trial than during the dehydrated trial. Self-reported symptoms were hypothesized to be more abundant in sedentary individuals than in endurance trained individuals across both trials. Data concluded that aerobically fit and hydrated individuals can regulate their heart rate and blood pressure more quickly than unfit and dehydrated individuals, but the differences in these values between the two groups were not significant (p>0.05). It was also concluded that sedentary and dehydrated individuals were more likely to experience symptoms of pre-syncope than endurance-trained and hydrated individuals.