To alleviate shoulder discomfort during movement, one must precisely target deep stabilizing muscles by controlling the motion, rather than compensating with large muscles (such as the deltoid) through movements that are too fast, heavy, or poorly controlled.

noli's read

The concept of targeting the deep stabilizing muscles of the shoulder while limiting compensation by large force-producing muscles (such as the deltoid) is solidly validated by movement research. A systematic review of electromyography (EMG) studies by Edwards et al. confirms that execution control radically modifies the engagement of these deep muscles relative to superficial ones. Furthermore, an observational study by Kim et al. (2019) demonstrates that slow, well-guided movements allow for the isolation of the rear shoulder while calming deltoid activity. Nevertheless, the emphasis placed on the triceps as a major 'error' is somewhat exaggerated from an anatomical perspective, as this arm muscle is only minimally involved in rotation, except in cases of poor elbow posture. Similarly, dismissing strength in favor of 'reactivity' alone is nuanced by scientific consensus (such as that published in SICOT-J in 2023), which reiterates that progressive load strengthening remains essential for long-term shoulder comfort. The precision approach proposed by the creator therefore remains excellent for refining one's movement, even if one should not fear increasing the load progressively thereafter.

the sources

No named source held this one up — that absence is part of the verdict.