People with chronic health issues such as diabetes and rheumatoid arthritis can benefit from aquatic fitness classes. These classes, which include high-intensity interval training (HIIT) workouts done in a swimming pool, can improve exercise capacity by making it easier for the body to use oxygen efficiently and increasing endurance. Aquatic HIIT is less taxing on the joints, making it a suitable option for those who find land-based workouts challenging. Studies have shown that aquatic HIIT can be just as effective as land-based HIIT in improving exercise capacity. Participants in these studies, who had various medical conditions, consistently completed their aquatic workouts, suggesting that this form of exercise is both feasible and enjoyable. Specialized equipment like fins and water shoes can enhance the safety and effectiveness of these workouts. Overall, aquatic fitness classes offer a supportive environment that can help people with chronic conditions maintain a consistent exercise routine and improve their overall fitness.