Many people have the habit of sticking one foot out of the bed while falling asleep, and science shows there’s a reason for it. This common behavior is linked to the body’s regulation of temperature, a key factor in achieving restful sleep. According to María José Martínez, coordinator of the Chronobiology group at the Spanish Sleep Society, our bodies need to expel internal heat to rest properly. “The blood capillaries open, increasing peripheral temperature in the skin, hands, and feet,” she explains. Sticking a foot out of the covers helps dissipate this heat, making it easier for the body to lower its core temperature and prepare for sleep. This same process can be observed in babies, whose red, warm ears and noses indicate peripheral vasodilation.

This simple act highlights the importance of body temperature in sleep quality. When our organs cool down slightly, we can fall asleep more quickly and enjoy deeper rest. While sticking out a foot is a natural, instinctive method to regulate temperature, other habits also play a major role in improving sleep. Following a consistent sleep schedule, aiming for seven to eight hours of rest, helps regulate the body’s internal clock. Paying attention to meals and avoiding heavy food close to bedtime prevents discomfort that can disrupt sleep.

Creating a restful environment is equally important. A cool, dark, and quiet room supports relaxation, while limiting screen exposure and using blackout curtains or earplugs can enhance sleep quality. Avoiding long daytime naps, staying physically active earlier in the day, and managing stress or worries before bedtime also contribute to better rest. By combining these habits with natural temperature regulation, such as sticking out a foot, you can improve both the speed of falling asleep and the overall quality of your nights.