Sleeping for 7 to 9 hours at night isn't the only way to catch some z's. Here are four alternative sleep cycles -- and they're pretty obscure. Annie Miller Medical Reviewer Annie Miller is a licensed ...

Taking short naps under 30 minutes can boost energy and alertness. Biphasic sleep patterns may compromise sleep quality, compared to polyphasic and monophasic sleep patterns. Biphasic sleep may not be ...

You can try taking short naps under 30 minutes to boost your energy and alertness. Setting an alarm helps keep your naps under 30 minutes to prevent feeling groggy when you wake up. You might avoid ...