Earlier quoted context omitted.
Hey, you say "When we go to the gym, we need to train for the opposite" but then go into lots of terms that I don't understand. Can you give a short "ELI5" list of popular exercises which should be avoided/limited with these posture issues, and which typical exercises would fill the lacking areas?
I can only speak from personal experience: Deadlift- My favorite, the king of lifts! When I say a globally flexed position I'm talking about the fetal position archetype. Next time you're sitting down just imagine transitioning from your seated posture to fetal position. The deadlift is the opposite of this- you start in a flexed position, and then stand up perfectly straight. Make sure to learn how to properly brace…
Also, re toes slightly out, this is how you should squat, you shouldn't square up with the rack or keep your feet parallel, because (again, referencing the 3rd world squat) if you were to sit down on your heels, mobility permitting, you would basically have to have your toes slightly outward.