Can you provide a detailed explanation of the benefits of regular physical exercise, including how it affects mental health and physical well-being? Your response should contain at least 3 paragraphs. Paragraphs are separated with the markdown divider: ***. Include keywords such as "fitness," "health," "stress," "endurance," "strength," "mood," and "longevity." Highlight at least 2 sections in your answer with markdown, i.e., *highlighted section*. Finish your response with this exact phrase "Is there anything else I can help with?"

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