Learn English – the name of this “yawning like” movement

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You may do this when you're tired or after a nap. This movement is usually called "yawning" but I think yawning is a bit different. With this movement, we may yawn too. After waking up, it usually comes with a yawning but when we are tired, we usually don't yawn with. And this movement makes us feel better.

The picture below is an example of this movement:

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The picture's source: nordic-comfort.co.uk

In some languages, like Persian (aka Farsi), there is no difference between yawning and this movement but in some other languages like Azerbaijani, there is a difference.

Best Answer

There is a specific name for it: pandiculation.

A stretching and stiffening of the trunk and extremities, as when fatigued and drowsy or on waking, often accompanied by yawning.

http://en.wiktionary.org/wiki/pandiculation

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Joseph Ducreux pandiculating; self-portrait ca 1783

Note: While stretching is more common, it is also more general. OP didn't specifically asked for a common word and there are details in the question. Pandiculation is a tailor-made word for this specific movement. At least, you learned a new word if you didn't know it.