Common advice tells us we should strengthen the hell out of our glutes, lower abs, upper back and shoulder external rotators.
However, has anyone ever gotten some sort of imbalance-related injury from having glutes that were too strong in comparison to their hip flexors? Or lower abs that were too strong compared to their erector spinae? Or upper back too strong in comparison to their pecs? Or shoulder external rotators that were too strong compared to their shoulder internal rotators?
Is it even possible to get imbalances ‘the other way around’? In other words, if you just trained your glutes, lower abs, upper back, and shoulder external rotators, and ignored every other muscle group (like quads, hip flexors, chest…etc…), would you pretty much have perfect posture and never suffer imbalance-related injuries?