I'm getting old!

Yes, I admit it--freely. I played volleyball tonight for some exercise. There was a time (several years ago) when I could have kept up with the "younger" set (19-22 years old). Now, well, I hit the ball when it's near me and sweat like a pig. Sigh! I used to be toned and able to keep up. Now I get in the way more than anything. Sad, aren't I?