The mechanism for which PEH occurs is unclear. It is thought to be from structural, neurohormonal, and vascular effects of exercise, however, how these variables effect PEH in obese vs non-obese populations has not been studied directly. Using non-invasive methods such as heart rate variability (HRV), cardiac output (CO), and systemic vascular resistance (SRV) will assist us in creating a better idea of the mechanism that which PEH occurs, and any clinical difference central obesity has on these factors. A prior study from this lab found that obese subjects had a heterogeneous response in CO and SVR (increased cardiac output and augmented SVR) when compared to that of non-obese matched subjects, but once more these subjects were only evaluated for 1 hour postexercise.