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These projects were all completed by volunteers of the Tetra Society of North America, a Canadian-based charity that invents devices to overcome barriers faced by people with disabilities.

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http://tetranation.org/video/?contest=video-detail&video_id=1539
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Author: admin
Title: Exercise Jumper
Description: It took pages of mathematical calculations around the precise stretching and bouncing characteristics of exercise resistance bands to design this vertical exerciser. It was designed for a 32-year-old Ottawa man with some limb mobility whose only other outlet for exercise is moving up and down in a pool.
Votes: 3
Views: 121