In 2026, sleep research generally suggests that a 2-hour nap is too long for most healthy adults. While a 20-minute "power nap" or a 90-minute full sleep cycle can be restorative, a 2-hour nap often lands you in the middle of a deep sleep stage, leading to sleep inertia (that groggy, disoriented feeling upon waking). Furthermore, sleeping for two hours during the day can significantly disrupt your circadian rhythm, making it much harder to fall asleep at your regular bedtime. This can create a "sleep debt" cycle where you are tired the next day and feel forced to nap again. However, if you are recovering from significant illness or severe sleep deprivation, your body may occasionally require this extended rest, but as a daily habit, it is discouraged by most sleep specialists.