Why do you suddenly get a burst of energy right before going to sleep?

Many people experience a surge of alertness shortly before bedtime

I stayed with a good friend for a couple of weeks. At the time when I usually start to feel tired and look forward to going to bed, the opposite often happened for her. She would get an unexpected burst of energy and rush around the house and garden finishing unfinished tasks.

My friend isn’t unique in this. You might recognize it in yourself as well. Many people experience a surge of alertness shortly before bedtime. An important cause is what sleep scientists call cognitive arousal. During the day, your brain operates in action mode: responding, solving, performing. Only when you stop does your mind get the space to process the day. Thoughts that were postponed earlier resurface. Your body may be ready to call it a day, but your brain feels like continuing.

Undischarged tension

Stress often becomes noticeable only when distractions fall away. As soon as you relax, your body may temporarily remain alert due to stress hormones such as cortisol. It feels like energy, but it is actually tension that hasn’t yet been discharged.

Your biological clock also plays a role. Many people experience a small alertness peak in the late evening. If you expose yourself to bright light or use your phone at that time, you suppress the production of melatonin, the hormone that makes you sleepy. This reinforces the feeling of wakefulness.

Sometimes there is also a psychological factor involved. If you have little time for yourself during the day, the evening can feel like the only moment of freedom. Your brain doesn’t want to give that time up to sleep. This is known as revenge bedtime procrastination: delaying sleep out of a need for autonomy.

Of course, an energy spike right before bedtime isn’t very helpful. Sleep science shows that it can be associated with a longer time to fall asleep, more awakenings during the night, lower subjective sleep quality (how you experienced your sleep), and sometimes less deep sleep. The strength of this effect depends on whether it’s a healthy, creative evening flow or problematic hyperarousal. In other words: once in a while is not a problem.

Deliberate wind-down phase

So what can you do? The most important step is to create a deliberate wind-down phase. Give yourself at least an hour to close the day. Dim the lights, stop working, and avoid intense stimulation. It also helps to write down your to-dos or worries earlier in the evening so they are less likely to surface in bed. Go to bed only when you truly feel sleepy, not simply because it’s late.

An evening surge of energy does not mean there is something wrong with you. It is usually a combination of biology, stress, and habits. But by consciously shaping your evening routine, you help your body transition more smoothly into sleep.