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Lots of people set the alarm with the best of intentions, knowing that\u2019s the time they need to get up to meet the day\u2019s demands. But then the alarm clock seems to ring way before they\u2019re ready to rise, so they\u2019re hitting snooze and, eventually, running late. Something\u2019s got to give.
\nThe key lies inside your body. \u201cAn important factor in being able to wake up easily at the desired time in the morning is the timing of one\u2019s circadian rhythm, or \u2018body clock,’\u201d says sleep researcher Leon C. Lack, PhD, professor emeritus in the school of psychology at Flinders University in Adelaide, Australia. Much of what you need to do to wake up on time starts by planning your sleep schedule the day and the evening before \u2014 and by making your mornings count.
\nHow do our internal clocks work, and how much can we control them? According to the National Institutes of General Medical Sciences (NIGMS), the body\u2019s master clock, located in the brain, produces and regulates our circadian rhythms, which help determine sleep patterns over the course of a 24 hour period. Environmental signals, such as daylight and darkness, affect circadian rhythms, too. When incoming light hits the optic nerves, information is passed along from the eyes to the brain. When there is little or no light \u2014 at night \u2014 your clock tells the brain to make more melatonin, a hormone which makes you sleepy.<\/p>\n
Our sleep-wake cycles, hormone levels, metabolism, and body temperature are all affected by our circadian rhythms, notes the National Institute of Neurological Disorders and Stroke. When your rhythm is off, you may be at risk for more than just a few groggy days you drag yourself through. Irregular rhythms, the NIGMS notes, have been linked to chronic health conditions, such as obesity, diabetes, depression, bipolar disorder, and seasonal affective disorder<\/p>\n