How much influence does genetics have on baseline fitness and trainability? Now we can map the human genome. Can genetics predict athletic success?

How much influence does genetics have on baseline fitness and trainability? Now we can map the human genome. Can genetics predict athletic success?
Stretching is universally performed by exercisers across the globe. But have you ever stopped to think why am I doing this? Does it prevent me from injuring myself? Will it help my performance? This post brings you the evidence you need to know about stretching.