Use two cups of cider vinegar in the tub to soak sore muscles and add potassium to muscles. You can treat muscle cramps or Charlie horses by soaking in a tub with some vinegar in it. These cramps are caused by low potassium.
You can also help night time leg cramps by supplementing meals with a glass of water, fortified with apple cider vinegar.
Another recipe for preventing leg cramps is combine 1 teaspoon honey, 1 teaspoon apple cider vinegar, and 1 tablespoon calcium lactate in 1/2 glass of water. Take once per day.