Growing Pains: Myth or Reality

If we truly learn from our mistakes, growing can be a little painful depending on the size of the mistake. Growing pains of childhood are a different matter. It is commonly believed that growing pains are caused by stretching leg muscles, due to rapid growth of bones. How many times did you hear your parents explain the pain in your leg as "growing pain"? I will admit I use it all the time.

So tell me, do you think growing pains are a myth or reality?