A pedal exerciser is a portable equipment designed with crank pedals that are pedaled in a stationary position for short cardio exercises. They target your calves, hamstrings, quads, and glutes, and help with blood circulation and muscle endurance. They can also be used for your upper body, just place it on top of a desk/table and pedal with your hands/arms. They also work well for rehabilitation since they’re low impact and low intensity. Knee replacements, shoulder injuries, you name it.