the short answer
Full body vs split training is a choice about how to distribute a muscle's weekly sets. A full-body routine trains most muscle groups every session (run 2-3x a week for high frequency); a split divides the body across days so each session focuses on fewer muscles. Neither is inherently better - total weekly volume drives growth, so the best one is whichever lets the client hit that volume, recover, and stay consistent.
This article is general programming guidance for coaches, not medical advice - adjust load, volume, and frequency to each client's training history, recovery, and any conditions, and refer medical questions to a qualified clinician.