Since all you need is one instance, let me share. I am a runner. I run a lot to stay in shape. I am not particularly slow, and ran track in school. I ran once w

Since all you need is one instance, let me share. I am a runner. I run a lot to stay in shape. I am not particularly slow, and ran track in school. I ran once with a friend of mine who had a natural runners build, but wasn't a runner and hadn't run in years. He smoked me, trotting along effortlessly while leaving me behind absolutely breathless. It depends on what you are doing but sometimes people are just wired for something better than others. But everyone can almost always get much better with training.