I have always had slumped shoulders and would love to sit up straight. An ad for a posture corrector has popped up on my laptop and I'm tempted to try it, but I'm afraid it's a big con and I'll be throwing my money away.
It's a kind of harness strap that you put on under your clothes and it forces you to sit straight, until eventually you sit straight even without the harness.
Has anybody ever tried one of these? Did it work? Would appreciate anyone with experience of something like this giving their opinion