question #3 Sahih Muslim 474a, Book 4, Hadith 224 : What can be learned about the timing of movements in congregational prayer from this account?

They used to say prayer behind the Messenger of Allah (ﷺ). I never saw anyone bending his back at the time when he (the Holy Prophet) raised his head, till the Messenger of Allah (ﷺ) placed his forehead on the ground. They then fell in prostration after him.