I am 54, but started with symptoms about 6 years ago. I had terrible muscle spasms
in my thighs. I was unable to stand up, sit down, lay down, really couldn't move at all. I'm no whimp, but I almost had my husband take me to ER because the pain was so bad. It lasted several hours and he actually had to drag me to the bath to run warm water over my legs. I have had 2 other episodes of the spasms since then.