I am currently going through another phase of muscle tightness... This time it's affecting lots of my larger muscles, particularly my thighs and my abdominals. It feels as though the muscles are over-tight and on the verge of cramping, and any activity makes it worse. If I stretch the affected muscles, they do cramp up badly. I am taking magnesium but don't know if I am taking the right formula or the right amount. It's not particularly painful at rest, but I am aware of it all the time because it feels so not right. Any advice would be very welcome.