Stationary bike with visual indication of slope

A stationary bike, comprising:

• a lifting mechanism;
• a frame being connected to the lifting mechanism;
• a resistance device disposed on the frame and comprising an axis and a flywheel;
• a reluctance mechanism adjacent to the flywheel and pivotally connected to the frame, the reluctance mechanism comprising a plurality of magnets;
• a linkage mechanism comprising a first linkage seat that is pivotally connected to the reluctance mechanism;
• a first cable having two ends respectively connected to the first linkage seat and the lifting mechanism;
• a linear mechanism being connected between the frame and the lifting mechanism, wherein a length of the linear mechanism is adjusted to change an angle between the lifting mechanism and the ground, and at the same time the first cable drives the first linkage seat, causing the reluctance mechanism to pivot and hence to approach or move away from the flywheel thereby changing a resistance applied to the flywheel;
• and
• a first visual indicator emitting a light with a color determined by a first parameter comprising a slope of the stationary bike.