Which strategy is most effective for enhancing physical performance at high altitudes?

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Raise the intensity of work while shortening exercise timeRaise the intensity of work while lengthening exercise timeLower the intensity of work while extending exercise durationLower the intensity of work while reducing exercise duration

Explanation

At high altitudes, reducing the workload and increasing the duration of exercise is the best approach to improve work capacity. This adaptation helps the body cope better with reduced oxygen availability. Increasing workload, whether with shorter or longer exercise times, can lead to quicker fatigue, while decreasing both workload and duration may not sufficiently stimulate adaptation.