Answered by Shaykh Faraz Rabbani
When one says “Allahu Akbar” between sujuds or rukus, is it incorrect if the saying of the “Allahu Akbar” extends to the point when one is already in the sujud or ruku?
Answer:
Walaikum assalam,
The recommended way for the dhikrs between the various prayer positions is to start as one begins moving, and to end extend it to the end of the movement. It is best not to stretch it such that one remains saying it after finishing the movement.
What is blameworthy, though, is to (start to) recite the movement dhikrs after finishing moving to the second position.
Wassalam,
Faraz Rabbani