World's Most Asked Questions: How Can I Fall Asleep?

What helps keep your body's natural sleep-wake cycle, known as your circadian rhythm, in sync?

• Eating a large meal before bed.

• Having a regular wake-up time each morning.

• Exercising right before going to sleep.

• Watching TV in bed.

What hormone helps your body relax and prepare for sleep, and what stops its release?

• Serotonin, loud noises

• Dopamine, exercise

• Melatonin, light exposure

• Adrenaline, darkness

Why do scientists suggest avoiding phones and laptops for at least an hour before bed?

• The sound from electronics can keep you awake.

• The light emitted by electronics can confuse your body's sleep signals.

• Electronics can overheat and cause discomfort.

• It's a good time to read a physical book instead.

How long before bedtime can drinking caffeine still be linked to having trouble sleeping?

• 1 hour

• 3 hours

• 6 hours

• 12 hours