Why Sleep On The Left Side?

By sleeping on the left side, we promote the health of most of our organs because we make their work easier. Among other things, we improve blood circulation and digestion.

Which side of your body do you usually sleep on? Right or left? Or maybe you sleep on your back? Experts tell us the best way is to sleep on your left side. We tell you why.

The 5 reasons to sleep on the left side

You may be surprised by the title of this article. You are also likely to be one of those people who never wondered if sleeping in a certain position could be more or less beneficial for the body.

But it does matter. Oriental medicine has recommended sleeping on the left side for a very long time.

A recent study, published in The Journal of Clinical Gastroenterology, demonstrated this through simple principles, which Dr. John Doulliard tries to summarize as logically as possible, so that we can all understand them.

We are going to give you a little summary so that you can put it into practice. You will be convinced.

1. To promote lymphatic drainage

Doctor Doulliard explains that sleeping on the left side is to respect the nature of our body. In this part is our lymphatic system.

It is this which allows us to drain because the lymph carries certain important elements, such as proteins, glucose or metabolites, which will be filtered by the lymphatic nodules,  then transported to the left side of our body.

The first reason for sleeping on the left side is therefore based on respecting our lymphatic system.

2. For anatomical reasons

You may not remember it, but the stomach and pancreas are on the left side of our body.  Thus, sleeping on the left side allows our body to proceed with better digestion.

It is a good way to channel gastric juices and promote the secretion of pancreatic enzymes. So this allows this process to happen gradually, and not all at once, as it is when we sleep on the right side.

3. For the well-being of the heart

sleep on the left side

Does that surprise you? It is very likely that it does. This study explains to us that 80% of our heart is located on the left side of our body, and that by sleeping on this part precisely, we promote our heart health in a simple and natural way.

Especially since the lymphatic system, as we explained, is better able to drain in this position. But also because the aorta comes out of our body forming a sort of arch to the left side of our body to reach the abdomen.

If we sleep on the left side, our heart will pump easier and more optimally, circulating blood more easily. Did you take notes? 

4. For a restorative nap

If you like to take a nap, or just can’t escape it when you’ve eaten too much, then do that on your left side as well. In this way, you will promote your digestion.

You’ll wake up feeling fitter, less tired, and without bowel pain. Give it a try and you will see the good of a little nap on the left side. 

5. For the health of the spleen

Sleep well

The spleen, as you know, is also located on the left side of our body. This organ is therefore at the base of our lymphatic system, and it is therefore necessary to filter the blood and for the good performance of our lymphatic function.

D ormir on the left side of our body, allows the fluids it contains to go to the spleen in a very simple way, thus promoting the phenomenon of gravity that governs us. This is because the majority of our lymphatic system performs its functions on this side.

You now know that for your health it is recommended to sleep on the left side. Are you going to try it tonight?

  • Hoque, E., Dickerson, RF, & Stankovic, JA (2010). Monitoring body positions and movements during sleep using WISPs. https://doi.org/10.1145/1921081.1921088
  • Jarus, T., Bart, O., Rabinovich, G., Sadeh, A., Bloch, L., Dolfin, T., & Litmanovitz, I. (2011). Effects of prone and supine positions on sleep state and stress responses in preterm infants. Infant Behavior and Development. https://doi.org/10.1016/j.infbeh.2010.12.014
  • Victores, AJ, Hamblin, J., Gilbert, J., Switzer, C., & Takashima, M. (2014). Usefulness of sleep endoscopy in predicting positional obstructive sleep apnea. Otolaryngology – Head and Neck Surgery (United States). https://doi.org/10.1177/0194599813517984
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  • Leung, RS, Bowman, ME, Parker, JD, Newton, GE, & Bradley, TD (2003). Avoidance of the left lateral decubitus position during sleep in patients with heart failure: relationship to cardiac size and function. Journal of the American College of Cardiology41 (2), 227-230.
  • Penzel, T., Möller, M., Becker, HF, Knaack, L., & Peter, JH (2001). Effect of sleep position and sleep stage on the collapsibility of the upper airways in patients with sleep apnea. Sleep24 (1), 90-95.
  • Lee, H., Xie, L., Yu, M., Kang, H., Feng, T., Deane, R.,… & Benveniste, H. (2015). The effect of body posture on brain glymphatic transport. Journal of Neuroscience35 (31), 11034-11044.

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