
A recumbent bicycle is a bicycle that places the rider in a laid-back reclining position. Most recumbent riders choose this type of design for ergonomic reasons; the rider`s weight is distributed comfortably over a larger area, supported by back and buttocks. On a traditional upright bicycle, the body weight rests entirely on a small portion of t....
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http://en.wikipedia.org/wiki/Recumbent_bicycle

(from the article `bicycle`) ...several other variants of the standard bicycle. Recumbent frames allow the rider to sit low to the ground in a slightly reclined position, with ...
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http://www.britannica.com/eb/a-z/r/21
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