The four sentences (labelled 1, 2, 3, and 4) given in this question, when properly sequenced, form a coherent paragraph. Decide on the proper order for the sentences and key in this sequence of four numbers as your answer.
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However, recent studies have shown a correlation between regular exercise and improved mental health.
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Exercise has long been recognized as a key component of maintaining physical health.
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In addition to the physical benefits, exercise can also have a positive impact on mental well-being.
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This is particularly important in today's fast-paced and stressful society.