When you're at the gym next, take a look around and focus on one piece of
equipment. Without leering, watch different people use it. Do they all
have the same technique? The magic 8-ball says, "Very doubtful."
Why do their techniques vary? Do they all know something you don't? The
magic 8-ball says, "Don't count on it." You might see a wide range of
people using the machine with different levels of experience and
backgrounds. Some might know how to use it, some might not. How can you
tell which is better technique? By reading Optimal Muscle Training....
http://mytriathlontraining.com/content/technique-more-important-you-think-resistance-training