Are you feeling exhausted, or getting unusual muscle cramps during workouts? You might be deficient in magnesium. Magnesium is an essential mineral that 75% of the U.S. population is deficient in. “Studies have shown that only about 25% of U.S. adults are at or above the recommended daily amount of 310 to 320 milligrams for women and 400 to 420 for men,” says Dr. Danine Fruge, Associate Medical Director at the Pritikin Longevity Center in Miami, Florida.1 One of the benefits of magnesium is the ability to help produce more mitochondria during exercise. There are two ways to become a high performing athlete.