No, I'm not kidding - I felt them.
For the first time in more than 15 years I can feel my ribs. At least that's what I think they were. Without a past-life regression I can't be sure, but I read Who Weekly and I'm pretty sure that's what those hard symmetrical lumps in my previously soft and cuddly body are.
And here I was convinced that I was held together entirely by fat and wobbly bits...
Might go back to the gym now. Next step will be to be able to see actual bones, rather than just feel them!