I think there’s evidence of being good/strong at the things that you do the most, but I’ve always trained legs. I’ve squatted regularly for over 10 years. I’ve been lifting regularly for 15-16 years. I’ve never prioritized my squat, but I haven’t prioritized the others either. I’ve pretty much trained in balance the whole time whether it’s been for strength or physique.
In regards to my squat, I’m confused. Like I said, I’ve always trained legs, just not specifically squats. But I got a head start on everything else.
Another thing to consider is psychology. We’re all built differently. We don’t get to pick our genetics. You get what you get in terms of muscle fibers. Slow twitch dominant people are better at endurance stuff. Fast twitch folks are better at sprints and explosive stuff. Some people are average joes who are split down the middle. You can change yourself a little through training. If you’re 50% fast twitch and 50% slow twitch then you might be able to move that 5-10% one way or the other through training.
But with that in mind we all tend to gravitate towards things at which we are good. It’s only natural. Never, in my entire life, have I enjoyed a run. But I’ve always felt good doing short sprints. Work me hard, let me rest, and then repeat. But you can go to hell if you want me to run for 30 minutes straight at a slow pace LOL!
The psychological part might steer us towards the things at which we accel even without us realizing it. Perhaps I enjoy pushing myself on deadlifts so I train better. I tend to loathe squats so maybe I’m subconsciously sabotaging my progress by not giving it my all?
I guess it could come down to the chicken or egg debate. Am I good at a certain lift because I enjoy it? Or do I enjoy it because I’m good?
EDIT I just need to get on Sports Science and have them test me out! I bet they can explain all of this to me.