The last paragraph of the first section of the article even says:
“Most people who focus solely on the big three aren’t really even using the strength they’re building in everyday settings.”
I think this same line of thinking applies to people that DON’T focus solely on the big three (of which group, I am one). So…let’s define ‘functional strength’. This is what comes up from a Google search
“Functional strength training involves performing work against resistance in such a manner that the improvements in strength directly enhance the performance of movements so that an individual’s activities of daily living are easier to perform.”
I think it’s safe to say that nothing I do in the gym will ever impact my life outside the gym, with the exception of loaded carries/farmer’s carries. And I don’t think that I am alone in this regard. I sit at a desk 8-10 hours a day staring at a computer and then I go home (after hitting the ‘pointless’ gym, of course). Physical activity at home? Loading/unloading the dishwasher, mowing the yard, carrying bags of groceries from the car to the kitchen, planting flowers, walking up and down stairs.
Farmer’s carries will help my grip strength so that I can carry more groceries at once to the kitchen. Multiple trips? Nah, I do farmer’s carries!
I’ve always been curious, however, how a one-legged squat with a kettle bell will improve my life at home or at the office more than a two-legged squat with a barbell. Or how doing a one-armed push up will better me outside of the gym as compared to doing a standard two-armed bench press with a barbell.
(I know that sounds a bit cheeky, but I’d love to hear a real answer. If I can’t actually get a real answer, then I suppose the answer might be that only those who have manual labor jobs should train at the gym. Nobody else can reap any ‘functional’ benefit from the gym.)
I suppose my point is this: If the author’s thesis is that people should try different exercises outside of the big three in order to alleviate joint pressure, or to equalize strength imbalances, or to further improve core strength, then he shouldn’t have couched his argument in terms of ‘functional strength’.