If you're ready to shake up your fitness routine with something fun, effective, and refreshing, it's time to dive into Pool HIIT—a perfect blend of high-intensity interval training (HIIT) and the low-impact benefits of water exercise. Whether you're a beginner or an experienced athlete, these 30 water-based workouts will help you torch calories, build muscle, and boost your endurance—all while enjoying the cooling, joint-friendly environment of the pool.