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The most frequently used instruments in gym is lie flat rack, barbell bench press needs someone to do insurance. If you choose the bench press alone, and you don't have enough strength to support a barbell, then the barbell vertically down onto tumbled into the neck or chest, when this occurs, at any time can have life risk, and so many people died. “Your bodyguard ”is a device that can adjust the height, when the emergency happens, can protect the people under the barbell from injury.
Dalian Minzu University
Dalian Nationalities University