Like the food that you eat everyday is important for providing you the needed strength, in a similar way, having a good night sleep is equally important.
A new study has pointed out that lack of regular circadian sleep can cause attention deficit hyperactivity disorder (ADHD), which affects around 75 percent of children and adults.
ADHD, which is associated with many sleep-related disorders, including restless-leg syndrome, sleep apnea, circadian rhythm disturbance and delayed sleep phase syndrome, was until now thought to be separate issues.
"There is extensive research showing that people with ADHD also tend to exhibit sleep problems. However, based on existing evidence, it looks very much like ADHD and circadian problems are intertwined in the majority of patients" said, Sandra Kooij, associate professor at VU University Medical Centre in Netherlands.
In 75% of ADHD patients, the physiological sleep phase - where people show the physiological signs associated with sleep such as changes in the level of the sleep hormone melatonin and changes in sleep-related movement - is delayed by 1.5 hours.
Many sufferers benefit from taking melatonin in the evening or bright light therapy in the morning, which can help reset the circadian rhythm, Kooij explained.
Researchers are working to confirm this physical-mental relationship by finding biomarkers such as vitamin D levels, blood glucose, cortisol levels, 24-hour blood pressure and heart rate variability, which may help "to treat some ADHD by non-pharmacological methods, such as changing light or sleep patterns and prevent the negative impact of chronic sleep loss on health", Kooij said.
"We don't say that all ADHD problems are associated with these circadian patterns, but it looks increasingly likely that this is an important element," Kooij noted.