Your Spouse's Poor Sleep May Be Sabotaging Your Diet, Study Suggests

A recent study suggests that a partner's poor sleep habits could be undermining efforts to eat healthily. The research, which followed 204 cohabiting couples over three months, found that individuals reported reduced confidence and effort in maintaining healthy eating habits if their partner experienced sleep disturbances.

Participants completed questionnaires about their sleep and diet and kept diaries of their healthy eating attempts. Those who reported poor sleep indicated they made less effort to eat well. Significantly, their well-rested partners reported similar struggles, suggesting a shared impact on dietary choices.

"People with a sleep-deprived partner were essentially saying they have less confidence in their ability to follow a healthy diet, so they engage in less effort to do so," said corresponding author Jean-Philippe Gouin in a press release. He noted that while couples may share similar lifestyles initially, their routines and eating patterns can merge after moving in together.

Even individuals who were getting adequate rest themselves reported being exposed to more calorie-dense foods, such as chips and cookies, due to their partners' habits. This was particularly noted in couples where at least one partner was overweight or obese and actively trying to improve their diet or physical activity.

While sleep quality did not change significantly over the study period, diet quality saw a modest improvement, with women reporting healthier eating habits and more consistent attempts to stick to a diet. However, the researchers caution that the findings do not definitively prove that poor sleep directly causes unhealthy eating habits. The study relied on self-reported data, and future research may employ objective measures to track these behaviors.

The findings highlight the potential for joint-effort treatments to improve dietary habits, particularly by addressing one partner's sleep issues to support healthy eating in both individuals. Gouin emphasized the importance of considering the social context of eating behaviors, including the influence a partner's actions have on the other. "If we want to make changes that are long-lasting, both partners need to work together to change the home and food environment so that it is easier to maintain healthier habits over time," he stated.