On Aging (Haiku)

Is this what it's like
Bit by every little bit
First the knees, then back

Exercise be damned
I think it is what hurt me
Not as young as then

Going day by day
Everything was going fine
And then suddenly

At once it happens
No warning, no signs
Simply numbing pain

Getting up or down
Measure each motion with care
Others have it too

Now I understand
The pain need not be stated
But it is felt there