The more sleep - deprived you are, the
higher your
levels of the
stress hormone cortisol, which increases your appetite, and the harder it is to choose the salad
over the bag
of potato chips.
Throughout the sessions they completed questionnaires and provided saliva samples so researchers could observe their
cortisol levels (a
hormone released during
stress) before, during, and after the couples had it out
over the area
of disagreement that the couples deemed most intense (don't worry, couples were able to end on a
high note by discussing the positive aspects
of their relationships).