Cerebral Lactate Uptake in Obese and Non-Obese Individuals

The study aims to understand how the brain uses lactate, a byproduct of metabolism, in both obese and non-obese individuals. While lactate is often thought of as just a waste product, it actually plays important roles in the body, including being a source of energy and acting as a signaling molecule. The study focuses on how well the brain can use lactate when it is stressed, which may be different for those with obesity or type 2 diabetes due to possible issues in their lactate metabolism. This research is important because it might reveal new insights into brain function under stress and how obesity affects this process. Participants in this study will undergo an exercise stress test and engage in submaximal exercise, which is less intense than maximal effort. During these activities, researchers will measure the brain's blood flow using a technique called transcranial doppler, which is a non-invasive way to observe how blood moves through the brain. The study will compare these measurements between obese and non-obese participants to see if there are any differences in how their brains respond to lactate during exercise. Understanding these differences could lead to better strategies for managing conditions like obesity and type 2 diabetes.