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And to think the science of sleep is just really getting started. Stress and sleep are two sides of the same physiological coin and basal responses at that. Sleep well and manage stress to optimize health, productivity, and happiness. Yet, I know I'll spend the next decade showing the data to support that sentence.

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We should all hope health wearables arrive sooner. The sooner we get devices that accurately capture and measure personal health data (e.g., stress levels, cholesterol, blood pressure, glucose levels), the sooner we consumers can identify cause-and-effect relationships and determine the optimal behavioral patterns for maintaining health.

It depends on what you want. Accuracy and price are at cross purposes. Our biggest fear is the glut of cheap devices now is undercutting the long-term value for true health applications.

You can have an accurate step counter at a low price. The problem is that the step counter is being sold as a device that knows how well you sleep and how many calories you burn.

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