Old knees

I wish I knew how I ended up with knees that are 25 years older than the rest of me.  They're always reminding me how old they are, too.  Like today; I was hiking up on the trails at Hawk Mountain, and somehow it was harder to do than in years past.  Bending my legs to climb up a steep and rocky trail was never a problem in years past, but it is these days.  And I'm sure not looking forward to getting out of bed in the morning--the damn knees will probably be frozen in place.  In another 10 years I'll needed to move to a state that's completely flat, so I won't have to bend them at all.