Kouza holds several national records in swimming. In 2006, at the age of 17, she competed at the Nantes Natacion in Nantes, France where her recorded time in the breastroke events are still records for Algerian female competitors in French swimming events. In 2007, she swam a time of 2:35.80 in the 200m breaststroke at the Algeria 25m Championships. In 2014, she competed at the 2014 World Short Course Swimming Championships in Doha, where she broke national records in the 50m breaststroke with a time of 32.38 and 100m breaststroke with a time of 1:10.01. Yet the times were not fast enough to proceed, and she finished 43rd in the 50m breaststroke and 41st in the 100m.