In three studies, the authors found that arousal interfered with the effects of positive mood to influence resistance to tempting food. In one study, the authors asked some participants to watch a positive but calm movie clip while another set of participants watched a positive but arousing movie clip. All participants were then asked to choose between two snacks: a cup of grapes and a cup of M&Ms.
“The results showed that those participants who watched the arousing movie clip were more likely to choose M&Ms than those who watched the calm clip. Moreover, when participants who watched the calm movie clip would choose M&Ms, they were more likely to carefully regulate or monitor the amount of M&Ms they ate,” the authors write.
In another study, the researchers added exercise to the mix. Participants who watched the calm movie and performed a light exercise on a stepstool were more likely to choose M&Ms than those who were sedentary.