when I try and pull my tummy in, or stretch my tummy (kind of like when you pull yourself up to your full height) I get a strange ache, like a pulled muscle. It feels like I've done way too many sit ups, when in reality I've done none at all. Anyone else got this?
I just need a bit of reassurance, I also feel strange muscle twinges when I've been sitting down at work all day. I have to force myself to get up and walk around, but sometimes I'm so buried in work I forget for up to 5 hours at a time! It doesn't feel like cramps, which would worry me senseless though!