A (much older) friend of mine always said that when you hit 40 you start to groan when you get up off the sofa. At 42 I have a right knee injury - which has caused my left knee to take the strain and it actually hurts more than the injured knee, and my shoulder/neck/back has started to go into spasm as my body adjusts itself. I feel about 90 and my DH has started calling me "Little Old Lady". What is happening to your body/mind/life that reminds you that you aren't 21 any more?