I original had a response to the linked article, but figured going through them would be a 'dick-move' and did not post them. The article itself is embarrassing to read.
Okay... the primary claim of this article is that there are at least 8 ways in which strength is specific. Examples are given for the (at least) 8 types of strength. Lets go through them one by one.
#1. Eccentric Strength - The premise that training the concentric motion produces a different training stimulus than the eccentric motion; this would be self-evident. Similarly a front squat produces a different training stimulus to a deadlift. A different movement pattern does not constitute a new 'strength'.
#2. High-velocity Strength - So Power. Also... evidence that movement patterns train movement patterns.
#3. Maximum Strength - Aside from the laughable definition of light and heavy... moving heavier things through the same movement pattern means you are stronger.
#4. Range of Motion - How is 'range of motion' exclusionary to 'strength'? It appears to be the same statement... force exerted against an external resistance through a movement pattern.
#5. Stability - So... not falling down while performing a movement pattern... by applying a force against an external resistance... If you use a fixed machine... then you don't train the movement pattern or strength of the muscles required to maintain balance.
#6. External load type - Constant Loads, Accommodating Resistance, Constant Force, etc. -- So force applied against an external resistance that varies throughout the movement pattern.
#7. Force Vector - Varying the direction of the load (external resistance) -- So force applied against an external resistance.
#8. Muscle group - You need to train body parts... So force applied against an external resistance through a movement pattern.
So our new definition appears to be:
"Strength is force applied against an external resistance through a specific movement pattern."
I think the flaw in logic here appears to be that 'strength' means 'size'. They are linked factors, but the argument is that being 'stronger is inherently better' which is not the same as saying that 'larger is inherently better'.
Does anybody think that increasing an athlete's squat by 50 lbs without changing their mass or body composition will negatively impact their performance within their sport?