Polyphasic sleep divides rest into multiple short periods each day. It may offer more waking hours and flexibility for certain schedules. However, it can increase health risks over time from sleep ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." We all could probably use a little more energy these days, right? Maybe you’re managing a busy job, ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." We all could probably use a little more energy these days, right? Maybe you’re managing a busy job, ...