Psychophysiology is the study of how your body and mind work together. It looks at how different parts of your body, like your brain and your heart, affect your emotions, thoughts, and behaviors. It is like the science of studying how your body and mind talk to each other. Psychophysiologists (scientists who study psychophysiology) try to understand how things like stress, exercise, and sleep affect us. They look at how our bodies react to different things in order to help us better understand our emotions and behaviors.