Is 6 hours of sleep enough

Six hours of sleep may be sufficient for some individuals, but it largely depends on personal sleep needs, which can vary greatly. According to Andrew Huberman, the amount of sleep needed can change based on life circumstances, time of year, and individual health conditions. He emphasizes that if you're not experiencing excessive daytime sleepiness and feel energetic enough during the day, a shorter sleep duration like five to six hours might be adequate for you. However, he advises considering not just the quantity, but also the quality, regularity, and timing of sleep, a concept abbreviated as QqrT, devised by Matthew Walker, which highlights the importance of understanding one's own sleep requirements more holistically 1.

Furthermore, consistent sleep, rather than longer variable sleep hours, can be more beneficial. Ensuring you get roughly the same amount of sleep regularly might be better than sometimes getting more sleep and other times much less, suggesting that sleep consistency is key 2.