Used to get that a lot. Leg once cramped super hard which smashed my knee into a metal railing. Double agony that night. Magnesium supplements really helped

Used to get that a lot. Leg once cramped super hard which smashed my knee into a metal railing. Double agony that night. Magnesium supplements really helped a lot. Later on, stretching lots and lots of stretching. Now a massage gun. Cramps are a thing of the past.