true: Warming up is a great way to increase flexibility before a heavy set. Training the muscles through an identical range of motion to the lift that is to be done stretches the muscle properly and prevents a pull of any muscle about to be trained.
It's kinda obvious but I'll explain. You'll have a much lower chance of getting injured. And on top of that, You'll increase your range of motion. You should also have a cool down after you're done.
