Too Little or Too Much Sleep Can Harm Your Brain and Body

A new study in Nature highlights the risks of sleeping too little or too much. Both short and long sleep patterns can harm the brain, heart, lungs and immune system. Researchers warn that consistent sleep extremes may also affect mental health. The study found that sleeping less than six hours a night leads to irritability, mood swings and poor concentration. It also causes daytime sleepiness and difficulty focusing. On the other hand, sleeping more than eight hours can reduce light exposure and activity, making the body’s internal clock age faster.

Experts recommend maintaining a steady sleep schedule all year to support the body’s natural rhythm. Getting enough morning light and keeping a cool, dark bedroom helps improve sleep quality. Wearing blue light-blocking glasses and avoiding alcohol before bed are also advised.

Exercise benefits sleep but should be done earlier in the day. Oversleeping or undersleeping for long periods can lead to mild depression. For children, sleep needs vary by age, ranging from 8 to 16 hours. Adults are advised to get between 6 to 8 hours, with a minimum of 7 hours recommended by the American Academy of Sleep Medicine. The research underscores the importance of balanced sleep for physical and mental well-being. Both too little and too much sleep can have measurable effects on health. Following consistent sleep habits and a healthy environment can help reduce these risks.