Describe why humans have such a hard time with stress that continues over time?

Chronic stress, or a constant stress experienced over a prolonged period of time, can contribute to long-term problems for heart and blood vessels. The consistent and ongoing increase in heart rate, and the elevated levels of stress hormones and of blood pressure, can take a toll on the body.

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the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.