It's no secret that I'm a huge fan of both Gray Cook and Dan John. They are both eloquent speakers and presenters and have the rare ability to take complex subjects and make them easy to understand and apply.
Gray recently published an article on his website entitled "Strength?" where he discusses the use of the word "Strength" and how it is most times meant to describe work capacity instead. I have to admit that I sometime use the word "strength" when I should really use "work capacity"; my only defense is that most people do not know what work capacity is but have a "fuzzy" understanding of strength.
As a matter of fact Gray gives and excellent definition of work capacity that makes it much clearer to understand. According to Gray, work capacity is: the integrity of postures and patterns against fatigue across time. So what does that mean in English? It means how much can you squat, pull, push, hinge, carry or any other movement before fatigue starts to take its toll on you. This is important to know if you are an athlete in a particular sport but it might be life saving if you are a soldier or law enforcement officer.
So... is your goal to build strength or work capacity? I can't tell you because I don't know what your goals are. But I'm going to guess that whatever they are you're going to need to develop both and have strategies and protocols in place that allow you to develop them separately.
BTW - check out this article by Gray as well that this quote is extracted from: "Maybe real functional training is the ability to adapt and tolerate various forms of work and naturally become more efficient."
NOTE: if you are a coach or trainer you need to purchase Essentials of Coaching and Training Functional Continuums. This DVD has a gold mine of information that you will be able to apply to your athletes and improve their performance. Don't wait... buy it now!