Your brain clock is a cluster of brain cells in the hypothalamus that determines your sleep-wake time and is regulated by light and darkness, explains Delwyn Bartlett, a sleep psychologist with the Woolcock Institute of Medical Research in Sydney. Here’s how to keep it on track:
* Wake up at the same time every morning, even on weekends. This is more important than going to bed at the same time every night. "Waking up at the same time cues your brain to release sleep-wake hormones at the right time," she says.
* Get the light right. Melatonin, the sleep hormone that gets your brain ready for sleep, needs diminishing levels of light to help it kick in. Bright light - or staring at your laptop - can delay its effects. Keep lights in the bedroom low before you go to sleep. Have curtains that let you wake up to morning light.
* Check your blankets. To feel sleepy, your body temperature needs to fall. An overheated bedroom or an electric blanket turned up too high can make it hard to sleep. But a warm bath an hour before bed can help your temperature fall. The warm water artificially raises your temperature, which then has to come down once you’re out of the bath.
* Think about what you drink and eat before bed. Drinks containing caffeine - coffee, tea, cocoa and cola - can keep you awake. Although caffeine’s stimulant effect is strongest in the first hour or so after taking it, it can still be in your system eight hours later. While alcohol helps you doze off quickly, drinking too much too close to bedtime can backfire. One drink might be OK but too much can fragment your sleep because of falling blood-alcohol levels that can wake you up later in the night.
