A twenty-minute nap sharpens your mind. A sixty-minute nap saves you from a headache. A ninety-minute nap can change your life. But the wrong nap at the wrong time can ruin your night. The difference is not in the nap. The difference is in the length.

A power nap of ten to twenty minutes improves alertness and cognitive function without causing sleep inertia, the grogginess that follows longer naps. A thirty to sixty-minute nap includes slow-wave sleep, which is restorative but can leave you feeling disoriented upon waking. A ninety-minute nap includes a full REM cycle, which can enhance creativity and emotional processing. But any nap longer than thirty minutes taken after 3 PM can delay your bedtime and reduce overnight sleep quality.

The science of napping is the science of timing. A nap that is too long or too late can steal sleep from the night. A nap that is short and early can supplement it. This episode explains the research and offers practical guidelines for napping like a pro.

Turn down the lights, put on your headphones, and press play because the right nap can save your day. The wrong nap can ruin your night.