Rigidity in a manual wheelchair allows for greater efficiency of propulsion as the energy of propulsion is directed towards movement, rather than being lost in any flex in the wheelchair. There are numerous factors that can contribute to rigidity in a folding frame wheelchair, including the design of the cross-brace; the choice of seat saddle position in a modular frame wheelchair; the option of a fixed front end, particularly when combined with a flip-up platform; the use of a stabilizer bar; and the prescription of a firm back support.
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