The type of exercise primarily focused on improving flexibility is known as stretching. This can include static stretching (holding a position) and dynamic stretching (moving through a range of motion). Stretching exercises enhance the length and elasticity of muscles, improving joint mobility and overall range of motion. These practices are crucial for injury prevention, as they prepare the muscles and tendons for more intense physical activity. Regular flexibility training can also reduce muscle stiffness and discomfort, leading to better performance in various activities.