The present disclosure regards a manual treadmill. The manual treadmill includes a continuous belt coupled to a frame and adapted for an operator walking or running thereon; a sensing apparatus, sensing a parameter and producing a corresponding speed signal corresponding to a current rotating speed of the continuous belt; an inputting apparatus, producing an indication signal corresponding to a target rotating speed of the continuous belt; a control unit, receiving the corresponding speed signal to get a current speed value, receiving the indication signal to get a target speed value, and producing a first control signal; and a resistance adjusting apparatus, producing a resistance to impede the rotation of the continuous belt; wherein the control unit controls the resistance adjusting apparatus using the first control signal to decrease (or increase) the resistance when the current speed value is lower (or higher) than the target speed value.