One of my old Marine friends does that gun course where they make you do pistol, rifle and shotgun from a real life scenario.
His knees are shot and they started him in a bunk sleeping... LOL
He said he could barely get them old bones on the ground LOL
He completed the course
I always thought it ironic that once I could afford all the kit to shoot competitively I didn’t have the hips, knees, and was down to one lung...