Why some stress is necessary
And the stress-free life, Dr. Mattson added, might be the worst way to live. "If you are a couch potato, getting no physical exercise and no mental exertion, your cells become complacent. They are not stressed so why should they do anything?"

Low blood pressure linked with depression, tiredness
Individuals with low blood pressure may sometimes develop non- specific symptoms of tiredness, sleep disturbances, giddiness, black-outs, fainting, anxiety/depression, or sweating, and may become more conscious of their heartbeats.

People are bad at forecasting happiness
On average, bad events proved less intense and more transient than test participants predicted. Good events proved less intense and briefer as well. Generally, we are happier with closure, because we don't worry about it, than choice, which we do.

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