Prayer does not need KNEE REPLACEMENT.

Daniel 6:10 

Ephesians 3:14

Now when Daniel learned that the decree had been published, he went home to his upstairs room where the windows opened toward Jerusalem. Three times a day he got down on his KNEES and prayed, giving thanks to his God, just as he had done before.

For this cause I bow my KNEES unto the Father of our Lord Jesus Christ…

There is no REPLACEMENT for the time spent our knees in prayer. We NEED to be on our KNEES.