Stretching

I have the odd habit of working on my pics on my laptop, sitting on the floor of the last room of the flat. No table, no chair. I just feel comfortable that way. But, obviously, I need to stretch afterwards, which reminds me that I'm getting older (remember when you were a kid and could be hours and hours sitting and playing on the floor without any painful consequence? Well... I do!!) but also that I'm still quite agile... :p