I have posted and responded to many comments in this thread and for years I suffered excruciating nocturnal leg cramps. I am 73, female, normal/low BMI, non smoker.
I suffer from peripheral neuropathy and have some old MVA injuries to my left leg and spine.
The reason for this update is that I have been traveling for four weeks and have been unusually active (walking). This has caused a lot of pain. My diet has also changed significantly with far less sugar in my diet.
I have not had leg cramps at all whilst travelling.
It will be interesting to see if, when I return to my sedentary lifestyle with all day sugar snacking, my leg cramps return.