Almost every experienced bodybuilder will agree that the mind-muscle link is important to maximise the growth response to training. The better your ability to channel 100% focus on the muscle you are training, the better your results will be.
Now a recent study suggests the mind-muscle link is, in fact, a reality. British researchers found that you can actually increase muscle fiber activation during weight lifting by concentrating on the muscle during the exercise.
The mental part of the game in all sports is more times than not the deciding factor between between those who win and those who don't. As more researchers look into this aspect of performance, it's becoming very clear that enhanced mental focus directly impacts the the results you get from your training.