SportLegs is a lactate (not lactose) based calcium/magnesium supplement designed to prevent and relieve the muscle burn from sports and excercise. It primes muscles with lactate, your muscles' natural fuel, so they make less lactic acid. It works better than electrolytes, without sodium or painkillers. (You should continue to hydrate and youse your electrolyte products as needed.)
Take one capsule per 50 pounds of bodyweight, one hour before exercise. For sustained efforts, repeat every two to three hours. Take after exercise to help minimize soreness.
SportLegs come in a 120 capsule bottle or a 5 capsule packet that is convenient for carrying while you race.