treadmill

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treadmill

(formerly) an apparatus used to produce rotation, in which the weight of men or animals climbing steps on or around the periphery of a cylinder or wheel caused it to turn
References in periodicals archive ?
A nutritionist believes that putting a child on a diet or forcing him or her on to a tread-mill in a gym to lose weight is as bad as child abuse.
Soon after this, a tougher regime arrived, along with the dreaded tread-mill, which became standard equipment in almost all houses of correction and county gaols.