What is the best way to train for a marathon, considering you have 16 weeks before the race? Your response should contain at least 5 placeholders represented by square brackets, such as [training schedule]. The response must have 3 sections. Mark the beginning of each section with SECTION X. Include keywords [marathon, running, endurance, strength, recovery, hydration, nutrition]. In your response, the word [training] should appear at least 5 times.
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