To give a quick answer – most adults require 7-9 hours to be able to fully function the next day. Recommended sleep times change throughout age groups. Children need more than adults to assist with their growth and development. Sleep requirements begin to stabilise in your early 20s. The graph below breaks up the recommended hours for each age category:
In developed nations, the average adult only gets 6-7 hours sleep per night. This is due to different distractions that can inhibit sleeping hours, such as the internet, television, and mobile phones.
Sleep is an important pillar of health. It is very important to get the correct amount to be able to function at your best. A lack of sleep can have many negative consequences on your physical, mental and cognitive state. Some examples include: Poor memory and concentration, reduction in awareness, slower reaction times, moodiness and irritability, loss of motivation and reduced work efficiency.
It is best to follow the graph above for correct recommendations of sleep hours but you should also be guided by your own individual state of alertness – if you do feel tired in the daytime, aim to increase sleeping hours by going to bed earlier.
Some symptoms of sleep deprivation in adults include constant yawning, feeling groggy in the morning, poor concentration, increased irritability or other mood changes and the tendency to fall asleep when inactive (e.g. watching TV).
As always, if you are having trouble sleeping please consult your GP for medical advice.
Source: https://www.betterhealth.vic.gov.au/health/ConditionsAndTreatments/sleep, https://www.sleephealthfoundation.org
Disclaimer: While we do our best to gain information from reputable sources, this advice should not be interpreted as medical advice. If you are having trouble sleeping, please see your GP.