Flexibility is a joint's ability to move through a full range of motion.
It's important to clearly understand the many benefits that result from a good flexibility program. Improved Physical Performance and Decreased Risk of Injury First, a safe and effective flexibility training program increases physical performance. A flexible joint has the ability to move through a greater range of motion and requires less energy to do so, while greatly decreasing your risk of injury. Reduced Muscle Soreness and Improved Posture Recent studies show that slow, static stretching helps reduce muscle soreness after exercise. Stretching also improves muscular balance and posture.