You do everything right, control yourself all day but can't lose weight. A study from Northwestern University (USA) states that sleeping late is sabotaging your diet.
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Spending the morning watching your favorite series or browsing and texting on your smartphone may be the reason for your poor dietary choices.
So says a Northwestern University study of 96 adults, ages 18 to 50, who sleep more than 6.6 hours a night.
In the survey, the volunteers used a monitor to record sleep and physical activity for seven days.
They also had to record what they ate in the period.
The researchers found that those who go to bed later ate less vegetables and more fast food.
And they also turned out to be the least physically active of all.
On average, the owls went to bed at 12:45.
But the study reveals a curiosity.
Even making the worst choices, in the study who slept late was not overweight.
In fact, their Body Mass Index (BMI) and body fat index were the average of the other participants.
Strangely enough, those who sleep late did not consume more calories.
According to one of the study's authors, Dr. Kelly Glazer Baron, this is why they do not weigh more despite poor diet.
Still, it is surprising not to be overweight.
Scientists have a theory: People who sleep late are genetically programmed with a faster metabolic rate, which makes them eat fatter and denser calorie foods.
But there is one caveat.
As the study period was short (only one week), it was not possible to evaluate long-term results.
The reason why later sleepers have a nutrient-poor diet may be biological, as they may prefer calorie foods because they lack energy.
Or the reason may be social, staying late on the street with friends, in a bar between alcohol and snacks.
Knowing that these are eating habits, those who cannot sleep early should be alert to their appetite.
Trying to make changes in snack choices can improve the quality of what is being consumed.
And it can help you sleep better, as happens when we favor protein intake at night, for example.
It is these foods that provide the amino acid tryptophan, which converts to the hormones serotonin and melatonin - the latter in particular is necessary for the promotion of good sleep.
To see the menu that provides a restful night - click here.