Exercises that best build endurance include aerobic activities such as running, cycling, swimming, and rowing. These exercises engage large muscle groups and elevate the heart rate, improving cardiovascular fitness. Incorporating interval training, where bursts of high-intensity work are alternated with lower-intensity recovery periods, can also enhance endurance. Additionally, circuit training that combines strength and conditioning can be effective. Consistency, gradual progression, and incorporating a variety of workouts can help individuals achieve their endurance goals and improve their overall fitness levels.