This is an x-ray of my left leg in January 2018. Note the pin vertically fixed with two horizontal pins. One of my accidents after falling and managing to split the femur (top bone of the leg). And now I should tell you all about kneeling.
Of course I can kneel, no problem, I just have to call an ambulance with two strong men (the stronger the better) to pick me up again. Once I am up I can do the rest myself. Luckily I am not a church goer or have contact with royalty. All that kneeling would be too much for my knees.