Bad backs are prevalent on both sides of my family. I'm 6' tall, and have a long back. My saving grace is that I have a good metabolism and can stay skinny pretty easily, but if I ever put on a little weight, my spine would let me know about it!

Even if I somehow retain my figure into my thirties and forties, it's still more than likely that the bad back genes will have kicked in by then. It probably doesn't help that I have to lug my gigantic maths folders everywhere whilst I'm at sixth form college, or that I have a Mary-Poppins-like habit of filling up my handbags with everything from cameras to make-up sets, and then carrying all that on one shoulder.