The Happiness Lab with Dr. Laurie Santos What Screen Time Is Really Doing to Your Body with Manoush Zomorodi
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May 4, 2026 
Manoush Zomorodi, journalist and author of Body Electric, explores the hidden physical toll of screen-heavy life. They dig into brain fog, metabolism, posture, breathing, hearing, and vision changes. There’s also talk of boring walks, five-minute movement breaks, better workplace norms, sleep-disrupting habits, and why downtime helps us reset.
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A 23000 Person Trial Made Breaks Feel Real
- In a 23,000-person public radio trial, movement breaks made people 21 to 28 percent less tired without hurting productivity.
- Uber drivers, teachers, nurses, and students used timers, walking meetings, and office explanations like "it's for science."
Use Timers Until Your Body Learns The Rhythm
- Use a timer to start taking movement breaks, then let your body relearn the rhythm and begin prompting you itself.
- Manoush Zomorodi says even four or five breaks a day helped; the best movement is simply the one you take.
Screen Habits Can Reshape Developing Eyes
- Heavy near work can reshape developing eyes toward myopia because the eyeball adapts to constant close focusing.
- Maria Liu told Manoush Zomorodi the 20-20-20 rule is too little; going outside to look at the horizon every half hour is better.
