How does a stair stepper work to provide a cardiovascular workout and strengthen lower body muscles?

A stair stepper is a fitness machine that mimics the motion of climbing stairs. When you use a stair stepper, your legs move up and down against resistance, which helps to strengthen muscles in your lower body, including your calves, thighs, and glutes. This repetitive motion also increases your heart rate, providing a cardiovascular workout that can improve your overall fitness and endurance.