As children start spending more time on computers, experts say they might be putting themselves at risk of repetitive stress injuries such as carpal tunnel syndrome, which could show up as early as their teenage years.

But an innovative ergonomics program at Elizabeth Blackwell Elementary School in Sammamish, Wash., is trying to prevent that by teaching students to take breaks during long computer sessions, use correct posture to reduce strain on the upper body, and exercise fatigued muscles.

"Get TechFit!" was designed by Diane Tien, the school's instructional technology assistant,

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