user8817: I tried vipassana meditation and where i used to follow my belly for the inhale exhale. Every time I practised, I found that my sleep quality was disturbed. 
I found myself tired next day after the disturbed sleep. Did anyone experience the same? 

user471: According to the sutta below, it is one's state of mind which determines one's quality of sleep and not the comfort of the bed and bedroom.
Hence, if vipassana meditation improves the quality of your mind, then it should improve the quality of your sleep.
From AN 3.35:

“Well then, prince, I’ll ask you about this in return, and you can
answer as you like. What do you think? Take the case of a householder
or his son, who lives in a bungalow, plastered inside and out,
draft-free, with latches fastened and windows shuttered. His couch is
spread with woolen covers—shag-piled, pure white, or embroidered with
flowers—and spread with a fine deer hide. It has a canopy above and
red pillows at both ends. An oil lamp is burning there, while his four
wives attend to him in all manner of agreeable ways. What do you
think, prince, would he sleep well, or not? Or how do you see this?”
“He would sleep well, sir. Of those who sleep well in the world, he
would be one.”
“What do you think, prince? Is it not possible that a fever born of
greed—physical or mental—might arise in that householder or
householder’s son, burning him so he sleeps badly?”
“Yes, sir.”
“The greed that burns that householder or householder’s son, making
them sleep badly, has been cut off at the root by the Realized One,
made like a palm stump, obliterated, and unable to arise in the
future. That’s why I sleep well.
What do you think, prince? Is it not possible that a fever born of
hate … or a fever born of delusion—physical or mental—might arise in
that householder or householder’s son, burning him so he sleeps
badly?”
“Yes, sir.”
“The delusion that burns that householder or householder’s son, making
them sleep badly, has been cut off at the root by the Realized One,
made like a palm stump, obliterated, and unable to arise in the
future. That’s why I sleep well.


user-1: What happens when you observe the lying position (not focused but more in a relaxed way, as Lanka describes) instead of rising/falling?
Addition:
I thought about it a bit.
What came to mind is that due to vipassana your awareness increases. Which means that it's possible that you can become more aware of all sorts of conditions. For instance: temperature. What I find myself is that when I'm more aware of let's say temperature I can't sleep like when I'm not. My sleep is more disturbed too due to this (as an example).
But sleep is not always disturbed when practising vipassana before sleep. It depends also on the meditation object. You could try to switch to a different object.
Also, you could do metta instead of vipassana right before sleep.
It supposedly brings better sleep.

Eleven benefits to practicing Metta (loving kindness meditation:

You will sleep easily
You will wake easily
You will have pleasant dreams
People will love you
Devas (gods or angels) and animals will love you
Devas will protect you
External dangers, such as poisons, weapons, and fire, will not harm you
Your face will be radiant
Your mind will be serene
You will die unconfused
You will be re-born in happy realms


https://dhammawiki.com/index.php?title=11_benefits_to_practicing_Metta
http://www.vipassana.com/meditation/facets_of_metta.php

8817: <p>I tried vipassana meditation and where i used to follow my belly for the inhale exhale. Every time I practised, I found that my sleep quality was disturbed. 
I found myself tired next day after the disturbed sleep. Did anyone experience the same? </p>
 471: <p>According to the sutta below, it is one's state of mind which determines one's quality of sleep and not the comfort of the bed and bedroom.</p>
<p>Hence, if vipassana meditation improves the quality of your mind, then it should improve the quality of your sleep.</p>
<p>From <a href="https://suttacentral.net/an3.35/en/sujato" rel="nofollow noreferrer">AN 3.35</a>:</p>
<blockquote>
<p>“Well then, prince, I’ll ask you about this in return, and you can
answer as you like. What do you think? Take the case of a householder
or his son, who lives in a bungalow, plastered inside and out,
draft-free, with latches fastened and windows shuttered. His couch is
spread with woolen covers—shag-piled, pure white, or embroidered with
flowers—and spread with a fine deer hide. It has a canopy above and
red pillows at both ends. An oil lamp is burning there, while his four
wives attend to him in all manner of agreeable ways. What do you
think, prince, would he sleep well, or not? Or how do you see this?”</p>
<p>“He would sleep well, sir. Of those who sleep well in the world, he
would be one.”</p>
<p>“What do you think, prince? Is it not possible that a fever born of
greed—physical or mental—might arise in that householder or
householder’s son, burning him so he sleeps badly?”</p>
<p>“Yes, sir.”</p>
<p>“The greed that burns that householder or householder’s son, making
them sleep badly, has been cut off at the root by the Realized One,
made like a palm stump, obliterated, and unable to arise in the
future. That’s why I sleep well.</p>
<p>What do you think, prince? Is it not possible that a fever born of
hate … or a fever born of delusion—physical or mental—might arise in
that householder or householder’s son, burning him so he sleeps
badly?”</p>
<p>“Yes, sir.”</p>
<p>“The delusion that burns that householder or householder’s son, making
them sleep badly, has been cut off at the root by the Realized One,
made like a palm stump, obliterated, and unable to arise in the
future. That’s why I sleep well.</p>
</blockquote>
 -1: <p>What happens when you observe the lying position (not focused but more in a relaxed way, as Lanka describes) instead of rising/falling?</p>
<p>Addition:
I thought about it a bit.
What came to mind is that due to vipassana your awareness increases. Which means that it's possible that you can become more aware of all sorts of conditions. For instance: temperature. What I find myself is that when I'm more aware of let's say temperature I can't sleep like when I'm not. My sleep is more disturbed too due to this (as an example).</p>
<p>But sleep is not always disturbed when practising vipassana before sleep. It depends also on the meditation object. You could try to switch to a different object.</p>
<p>Also, you could do metta instead of vipassana right before sleep.</p>
<p>It supposedly brings better sleep.</p>
<blockquote>
<p>Eleven benefits to practicing Metta (loving kindness meditation:</p>
<ol>
<li>You will sleep easily</li>
<li>You will wake easily</li>
<li>You will have pleasant dreams</li>
<li>People will love you</li>
<li>Devas (gods or angels) and animals will love you</li>
<li>Devas will protect you</li>
<li>External dangers, such as poisons, weapons, and fire, will not harm you</li>
<li>Your face will be radiant</li>
<li>Your mind will be serene</li>
<li>You will die unconfused</li>
<li>You will be re-born in happy realms</li>
</ol>
</blockquote>
<p><a href="https://dhammawiki.com/index.php?title=11_benefits_to_practicing_Metta" rel="nofollow noreferrer">https://dhammawiki.com/index.php?title=11_benefits_to_practicing_Metta</a>
<a href="http://www.vipassana.com/meditation/facets_of_metta.php" rel="nofollow noreferrer">http://www.vipassana.com/meditation/facets_of_metta.php</a></p>
