Adolescents need around 8-10 hours of sleep, which is more than the 7-9 hours recommended for adults. Sleep deprivation can have serious consequences on mental and physical health, and sufficient sleep is crucial for both teenagers and adults.
Sleep is essential to human health, particularly during adolescent and adult years when both physical and cognitive development is occurring. The amount of sleep needed varies by age, with teenagers requiring more sleep than adults to function optimally. A study cited in your question showed that teens slept an average of 8.9 hours, while adults only slept 6.9 hours on average.
Not having enough sleep, or sleep deprivation, can lead to various negative outcomes such as reduced alertness, decreased mental efficiency, and an increase in accidents. Moreover, it's also associated with long-term health issues such as obesity, increased blood pressure, and reduced immune function.
Insufficient sleep can stem from various factors, including increased workload, stress, and the distractions of modern life. It's important for both teenagers and adults to ensure they're getting enough sleep for overall health and well-being. In the case of persistent sleep issues, one should seek medical advice.