Health Tips

“Early to bed, early to rise, makes a man, healthy, wealthy and wise.”

Modern-day living in the Malaysia and many other countries does not always embrace the necessity for adequate sleep, due to many reasons. Yet, it is important that people make an effort to get enough sleep regularly.

Why is sleep important?

1. It keeps your immune system strong and supports healthy growth and development of your body.¹

Renowned neurologist Dr David Perlmutter has stated that after 10pm, the body metabolises a lot of waste products, and from 11pm to 2am, the immune system recharges itself.² Immune system helps your body to fight off foreign or harmful substances and keeps it protected.

In a study, it was found that those who slept less than 7 hours were at greater risk by nearly 3 times to catch a cold when compared to those who slept 8 hours or more.³

Deep sleep also promotes the body to release the hormone that promotes normal growth in children and teens. This hormone also boosts muscle mass and helps repair cells and tissues in children, teens, and adults.⁴

2. It keeps your appetite and weight in control.¹

Studies show that sleep-deprived individuals tend to have a bigger appetite and overeat.⁵ This can be explained by science, as sleep helps maintain a healthy balance of the hormones that make you feel hungry (ghrelin) or full (leptin). When sleep is inadequate, this balance of hormones is disrupted and this results in higher level of ghrelin and lower level of leptin which stimulates appetite.⁵

3. It improves cognitive functions.⁶

While you are sleeping, your brain goes into restorative mode and prepare yourself for the next day. Having a good night sleep keep your brain active and sharp as it can enhance learning, improve problem-solving skills and decision-making skills and also be more attentive and mindful.

Sleep is important for the brain as studies demonstrate that lack of sleep may affects the brain in many ways. Skills such as problem solving, decision making and coping are all affected.

4. It keeps our mental health in check.^6,7

Many studies have found the association between sleep deficiency with poor mental health. Lack of sleep may be a contributing factor to mood swings, depression, suicide, risk-taking behaviour and negative moods such as anger, frustration, irritability and sadness.

Children and teens who are sleep deficient may have problems getting along with others. They may feel angry and impulsive, have mood swings, feel sad or depressed, or lack motivation.^8,9

             Image adapted from source: Henry Ford Live Well

How much is enough?^4,6

Factors like age, physical activity levels, general health and others can contribute to sleep duration but in general:

• Children (below 6 years old) – 10 to 14 hours
• Children (6-12 years old) – 9 to 12 hours
• Teenagers – 8 to 10 hours
• Adults – 7 to 9 hours

We tend to need less sleep as we age,⁴ but be guided by your own state of alertness – if you feel tired during the day, aim to get more sleep at night.

What helps:^1,8,9,10

• Get off from devices and screens ideally 1 hour before sleep time
• Avoid taking long naps during daytime
• Try to not take caffeine-containing drink (tea, coffee) few hours before sleep
• Practice relaxing bedtime routine (meditation, gentle yoga, taking a warm bath)
• Incorporate more physical activities during the day

What doesn’t help:^1,8

• Sleeping pills or medicines that cause sedation
• Alcohol
• Cigarettes

(These substances is likely to cause abuse and addiction which will result in worsening of health condition.)

Takeaway: Try to keep a consistent sleep-wake cycle⁸. It helps to improve your sleep quality and you will wake up fresher and keep on top of life’s challenges every day!

References:

1. Health Direct. 2020. Sleep. Available at: https://www.healthdirect.gov.au/sleep.
2. Marden, A. 2017. A doctor shares 7 secrets for a good night’s sleep. Available at: https://www.caredash.com/articles/a-doctor-shares-7-secrets-for-a-good-night-s-sleep.
3. Cohen, S., Doyle, W. J., Alper, C. M., Janicki-Deverts, D., & Turner, R. B. (2009). Sleep habits and susceptibility to the common cold. Archives of internal medicine, 169(1), 62–67. https://doi.org/10.1001/archinternmed.2008.505
4. American Sleep Association. 2020. What is sleep and why is it important? Available at: https://www.sleepassociation.org/about-sleep/what-is-sleep/.
5. Suni, E. 2020. Sleep and overeating. Available at: https://www.sleepfoundation.org/physical-health/sleep-and-overeating.
6. NHLBI. 2020. Sleep deprivation and deficiency. Available at: https://www.nhlbi.nih.gov/health-topics/sleep-deprivation-and-deficiency.
7. Fletcher, J. 2019. Why is sleep essential for health. Available at: https://www.medicalnewstoday.com/articles/325353.
8. Better Health Channel. 2020. Mood and sleep. Available at: https://www.betterhealth.vic.gov.au/health/HealthyLiving/Mood-and-sleep#:~:text=Studies%20show%20people%20who%20are,such%20as%20depression%20and%20anxiety.
9. Better Health Channel. 2020. Sleep deprivation. Available at: https://www.betterhealth.vic.gov.au/health/ConditionsAndTreatments/sleep-deprivation.

       10. Better Health Channel. 2020. Sleep hygiene. Available at: https://www.betterhealth.vic.gov.au/health/ConditionsAndTreatments/sleep- hygiene

Written By

Ms Caryn Lee

Reviewed By

Doc2us Medical Board