Alexandra Feodorovna brought substantial changes to Nicholas´ life - she had troubles with her legs and was unable to ride or to play tennis and badminton; walks were a torment to her and she often took to carriage even for short distances. She spent much time sitting at home and now and then, especially during her pregnancies, the doctors advised her to restrict her movements. Nevertheless Nicholas accepted all this without a murmur and, moreover, had no feeling of it being an imposition on himself. He could push his wife for hours in a bath chair around the garden or park.
She was, in contrast to all the others whose efect on Nicholas may have been strong but did not last, the only person whose influence remained constant throughout practically all his reign. … Instruction …from her, becoming more cathegorical with time, would accompany Nicholas all the rest of his life. “As early as the late 90s,” Koni wrote, “I heard talk from Ye. A. Naryshkina about her various faits et gestes aimed at inculcating the idea in her husband that as autocrat he had the right to do everything, unhindered by anything or anybody.” That this was indeed the case is easily confirmed from the correspondence of the imperial couple in later years too.
“Thank God, our Emperor is an autocrat and should remain so, as you are doing - only show more force and decisiveness,” Alexandra Feodorovna wrote to Nicholas on 7th September 1915. “You are master and sovereign of Russia, Almoghty God set you in place, and they should all bow down before your wisdom and steadfastness,” she repeated in a letter two days later. “Be Peter the Great, Ivan the Terrible, Emperor Paul - crush them all,” she demanded of her royal husbandon 14th December 1916. … “Above all exercise you will, my dear.”
M. Iroshnikov: The Sunset of the Romanov Dynasty