Constraints:
- Your response should contain at least 4 sentences.
- Highlight at least 2 sections in your answer with markdown, i.e., *highlighted section*.
- Include keywords: *health, fitness, energy, mood*.
- In your response, the word *exercise* should appear at least 3 times.
- Your entire response should be in English, and in all lowercase letters. no capital letters are allowed.
- At the end of your response, please explicitly add a postscript starting with *p.s.*.
user