Multitasking—a medical and mental hazard

Multitasking Damages Your Brain, health And Career

Multitasking reduces your efficiency and performance because your brain can only focus on one thing at a time. When you try to do two things at once, your brain lacks the capacity to perform both tasks successfully.

Those who multitask a lot and feel that it boosts their performance—were actually worse at multitasking than those who like to do a single thing at a time. 

Read more:

http://www.forbes.com/sites/travisbradberry/2014/10/08/multitasking-damages-your-brain-and-career-new-studies-suggest/#3a0c3db32c16

http://www.health.com/health/gallery/0,,20707868,00.html#it-s-slowing-you-down-0

http://mentalfloss.com/article/74914/why-multitasking-bad-your-brain

Multi taskers Are Distracted

Distraction can also be dangerous. David Strayer, a professor of psychology at the University of Utah in Salt Lake City and an expert on driver distraction, has found that a motorist talking on a cell phone is every bit as impaired as someone who’s legally drunk. And there are health costs: Stress, including the self-imposed kind, means more cortisol into the bloodstream. Chronically elevated levels of cortisol can damage the heart, cause high blood pressure, suppress the immune system, and make you susceptible to type 2 diabetes.

http://www.webmd.com/mental-health/features/why-multitasking-isnt-efficient

http://www.health.harvard.edu/blog/multitasking-a-medical-and-mental-hazard-201201074063