Guides
What the research says about resting your eyes and moving more when you spend your day at a screen.
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Long stretches of sitting and a shorter life: what the research found
A study of almost 8,000 adults found that how long you sit without a break matters, not just how much you sit in total. Here's what it measured, what it found, and what to do about it.
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The 20-20-20 rule: what it is and whether it works
Every 20 minutes, look 20 feet away for 20 seconds. Where the 20-20-20 rule came from, what the research says about it, and how to make it a habit.