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Stress is:
1. an age-old phenomenon
2. a response to external and internal triggers
3. tension that may cause disease
4. all of the above
What is "all of the above?"
Stress may date back to prehistoric times, but stress overload is thoroughly modern. One recent study estimates we have 1,000 times more stress in our lives than people had 100 years ago. Interestingly, the body's response to stress is the same as it was in the Stone Age: heart rates speed up, blood pressure rises, muscles tense, digestion stops, anxiety increases. But the "fight or flight" response that protected our ancestors from predators has few outlets in modern times. As a result, chronic stress can lead to hypertension, headaches, muscle pain, chronic diarrhea, stomach acidity and arrhythmia, among others.