A new study from the University of Granada, published in the European Journal of Nutrition, reveals that the last meal of the day is a key factor in determining both sleep quality and next-morning eating habits.
Researchers observed 14 days of real-life habits in obese men and women, monitoring meals with accelerometers and sleep trackers. They found a two-way relationship: dinner influences sleep, and sleep in turn shapes breakfast choices.
Dinner's Direct Impact Meals high in calories, fat, cholesterol, protein, alcohol, red meat, or fried foods were linked to poorer sleep. Conversely, dinners rich in carbohydrates, olive oil, and oily fish improved sleep quality. The study suggests the nutritional components of the evening meal directly affect sleep parameters, though researchers caution the observational design cannot prove direct cause and effect.
How Sleep Shapes Breakfast Poorer sleep quality was associated with less healthy breakfast choices. Specifically, more fragmented sleep correlated with higher sugar intake and lower fiber consumption, while longer sleep duration led to better breakfast quality. People who woke up later also consumed more calories at breakfast.
The research underscores a daily cycle where dinner, sleep, and breakfast are deeply interconnected, offering new insights for obesity prevention strategies.