He added: "The loss of an hour of sleep can disrupt the body’s circadian rhythm, which regulates sleep-wake cycles through hormonal and environmental cues like light exposure. Even a small shift in ...

In the systematic review and dose-response meta-analysis, a daily 1-hour increment in digital screen time was associated with 21 per cent higher odds of myopia (nearsightedness), according to the ...

In the systematic review and dose-response meta-analysis, a daily 1-hour increment in digital screen time was associated with 21 per cent higher odds of myopia (nearsightedness), according to the ...

The short answer: perhaps over an hour to under two hours, depending on elevation and your speed. Learn how those steps could make you live longer.