Which of the following techniques is best for improving flexibility?

Static stretching is the most effective technique for improving flexibility. This method involves elongating a muscle or muscle group and holding the stretch for a period of time, typically between 15 to 60 seconds. By doing this, static stretching helps to increase the range of motion of joints and enhances overall flexibility.

When engaged in static stretching, the muscle fibers are lengthened, which can lead to adaptations such as improved elasticity and increased blood flow to the muscles. This process not only helps in enhancing flexibility but also aids in injury prevention, improved posture, and better performance in physical activities.

On the other hand, strength training focuses on building muscle mass and strength, primarily targeting muscle contraction rather than elongation. Cardiovascular exercises improve heart and lung capacity but do not significantly enhance flexibility. Plyometrics, which involve explosive movements, are designed for power and speed, and while they may contribute to overall athletic performance, they do not specifically target flexibility improvement.