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smith machine
The Smith machine is a piece of equipment used in weight training. It consists of a barbell that is fixed within steel rails, allowing only vertical or near-vertical movement. A Smith machine often includes a weight rack in the base to help stabilise it. Some Smith machines have the barbell counterbalanced. The machine can be used for a wide variety of exercises such as a squat shown in the image to the right.
== Origin ==
The Smith machine was invented by American Jack LaLanne, who rigged up a sliding apparatus in his gym in the 1950s. It was spotted by men's bath house manager Rudy Smith, who commissioned Paul Martin to improve it. Smith then installed the modified model in a gym he was managing at the time, Vic Tanny's gym in Los Angeles. By the end of the 1950s, Rudy Smith was an executive in Tanny's chain of gyms, and the Smith machine was being manufactured and sold more widely.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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