On Thursday of last week, my left knee joint started feeling "loose," as if I had stretched the ligaments. I think I over-strained my knee ligaments while kneeling for several minutes in an attempt to increase the plantar flexion of my ankles. My knee doesn't hurt, I just feel and hear things moving around where I never did before. I've curtailed my activities significantly and will have a doctor look at my knee.
My traps and/or rhomboids are perpetually sore. I don't know if high-volume military presses did this, or something else. I'm taking time off to rest those, in addition to my knee. Not sure why I keep dealing with muscle and connective-tissue injuries so much. Such is the fun of growing older, I guess.