A water treadmill is a specialized piece of exercise equipment that allows individuals to walk or run in water while on a treadmill. This setup provides resistance from the water, making workouts more effective and low-impact, which is beneficial for rehabilitation and fitness training. Water treadmills are often used in physical therapy settings, as they reduce stress on joints and muscles. They can also be found in some gyms and fitness centers, catering to those looking to enhance their cardiovascular fitness or improve their overall strength while minimizing the risk of injury.