A stationary bike is a specialized piece of exercise equipment designed to simulate the experience of cycling within a fixed indoor setting. It typically features a saddle, pedals, and handlebars arranged similarly to a traditional bicycle, but utilizes a weighted flywheel and adjustable resistance levels—mechanical or magnetic—to vary workout intensity. These machines are widely used for low-impact cardiovascular training, allowing users to improve heart health, build lower-body strength, and burn calories without the joint strain associated with running or the navigational challenges of outdoor cycling. Modern iterations often include digital consoles to track metrics like cadence, power output, and heart rate, making them a staple for both casual fitness enthusiasts and competitive athletes.