Shawn Achor Quotes
When people exercise, we talk about endorphins, but endorphins are just short-term. The reason why exercise is valuable is it trains your brain to believe, 'My behavior matters,' which is optimism.
Citations
Achor, Shawn. The Happiness Advantage: The Seven Principles of Positive Psychology That Fuel Success and Performance at Work. Crown Business, 2010.
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Shawn Achor is an American author, and speaker known for his advocacy of positive psychology. He authored The Happiness Advantage and founded GoodThink, Inc.