How Can Lockdown Influence Eating Habits? The Spanish Case During the COVID Pandemic

Background and Objectives: Previous research shows that stress can alter eating habits. This study analyzed the impact of COVID-19 confinement on eating behaviors and weight in Spanish adults, as well as related factors. Methods: A total of 2834 adults (69.3% women, Mean age: 41.36) completed an online questionnaire assessing eating habits, weight, and sociodemographic variables. Results: Strict lockdown in Spain was linked to a general worsening of eating habits, particularly increased food intake and weight gain. Risk factors for less healthy eating and weight gain included being female (p < 0.001), under 35 years old (p < 0.001), overweight or obese (p < 0.001), caring for minors (p = 0.002), and experiencing nervousness or anxiety (p < 0.001). Conversely, maintaining pre-confinement eating habits and weight was more common among men (p < 0.001), individuals aged 50 years or older (p < 0.001), those with normal or underweight BMI (p < 0.001), those working outside the home (p < 0.013), and those without minors in their care (p = 0.001). Conclusions: Prolonged lockdowns associated with high stress may negatively influence diet and weight. Prevention strategies should therefore promote healthy eating during such periods, particularly targeting groups at higher risk of worsening habits and weight gain.