”If people warm-up at all, they usually static stretch. Static stretching immediately before exercise can cause performance decrements; it can also increase your risk of injury. Stretching can also cause a short-term decrease in musculotendinous stiffness. If joints are relying on this stiffness for force production or stability, this decrease can lead to undesired joint movements and eventually cause injury. This is especially true in runners who do the standard calves and hamstrings stretches outside, and go immediately into their run.
There is research demonstrating that runners who static stretch immediately before they run actually suffer more injuries than those who don’t. Dynamic warm-ups with joint mobility and muscle activation exercises will improve your range of motion while promoting muscular control. This gives you the best chance to move efficiently and avoid injury.” …
Scientific Reference>>> HERE