2 doctors weighed in:

Can sleep positions affect height? Does sleeping w/ 1 leg bent in fetal position or legs straight (feel bit pulling behind knees) add height in adults

2 doctors weighed in
Dr. Robert Kwok
Pediatrics

In brief: Not really

Any comfortable sleeping position may be used, and none of the positions add height more than any other position.
All the comfortable positions will add the same slight amount of height, because weight is taken off the spine during sleep (the vertical downward force of gravity is not acting vertically upon a person's spine, during typical sleep in a bed). The effect goes away, when one stands up.

In brief: Not really

Any comfortable sleeping position may be used, and none of the positions add height more than any other position.
All the comfortable positions will add the same slight amount of height, because weight is taken off the spine during sleep (the vertical downward force of gravity is not acting vertically upon a person's spine, during typical sleep in a bed). The effect goes away, when one stands up.
Dr. Robert Kwok
Dr. Robert Kwok
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Dr. James Ferguson
Pediatrics

In brief: No

Sleep position has nothing to do with final height.

In brief: No

Sleep position has nothing to do with final height.
Dr. James Ferguson
Dr. James Ferguson
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