When your legs won't work like they use to

You know how it is ...   

You're working away and the door goes, and it's the post man, and you know what he's bringing and you promise yourself you'll leave it in the bag until you've finished work... but then you want to open it just to check the colour, and then maybe give it a little squeeze, and then you've got it out of the hank, and you know if you leave it, it's just gonna get tangled so you've got to position yourself, so that you can still take your conference call, and hold the ball and wind it at the same time and watch the screen. 

It's a workout and a hobby all in one.