Drag reduction refers to techniques used to minimize the resistance an object encounters as it moves through a fluid, such as air or water. This is particularly important in fields like aerodynamics and hydrodynamics, where reducing drag can lead to improved efficiency and speed. For example, in automotive design, streamlined shapes help cars cut through the air more smoothly, enhancing fuel efficiency and performance. In sports, drag reduction can significantly impact athletes' performance. For instance, swimmers often wear specially designed suits that reduce water resistance, allowing them to move faster. Similarly, cyclists use aerodynamic helmets and clothing to decrease drag, helping them achieve better times in races.