I Am A 56 Yr Old Very Active Women. I

I am a 56 yr old very active women. I experience random cramp/spasms that are very painful in my legs toes feet abdomen and back. I take a magnesium supplement stretch, try to drink a lot of water with salt when sweating. I am on natural thyroid support. And I eat extremely healthy with mostly veggies, proteins and fats. What can you recommend ?