To improve cardiorespiratory fitness levels, the exercise that will most efficiently help Diana reach this goal is swimming. Swimming is an aerobic exercise that increases heart rate and promotes cardiovascular endurance, making it effective for improving cardiorespiratory fitness.
In contrast, yoga, weightlifting, and Pilates primarily focus on flexibility, strength, and muscle endurance rather than cardiovascular endurance. While they can contribute to overall fitness, they are not as efficient as swimming for enhancing cardiorespiratory fitness specifically.
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