Drinking salt water
I like to do hard cardio workouts several times a week. I use to always get bad calf cramps when I slept and after my workouts I literally felt like I was dying or something even if I drank a lot of water to rehydrate. But I started to put about a tablespoon of Himalayan salt in my water and chugging about 14oz of water after my workout. And about 45 minutes later I feel completely recharged and good to go. I never get calf cramps anymore unless I dont drink enough salt. And if I feel one ill just take another teaspoon worth of salt.
I believe what is happening is since I wear a hoodie when I run I am sweating so much salt out of my pours that I have no salt left in my body and replenishing that makes me recover faster.