Do formerly obese people tend to regain fat preferentially over muscle when on a caloric surplus?
I’ve been thinking a lot about this recently with the introduction of GLP-1s into the weight loss mix, and trying to find some other kind of questions beyond them!
If we get two trainees at identical beginner resistance training levels, both unenhanced, the only difference is trainee A was formerly class 3 obese (BMI > 40) and trainee B has never been obese, nor higher than their current weight.
If we were then to put them on a modest 10-15% calorie surplus, would trainee A gain back an appreciable amount of body fat due to their previous obesity whilst trainee B gains back proportionality more muscle? Or are the mechanics a lot more complex and at a genetic level beyond previous body composition state?
Effectively is there any evidence or studies out there to suggest that caloric surplus strategies to facilitate muscle gain put formerly obese individuals at a disadvantage to never obese?
I ask because almost everybody I have encountered who has previously been very overweight or obese and who has recomped to a higher and leaner muscular weight has introduced PEDs into the mix. Anecdotally most of them have said that they gained too much fat trying to gain slowly as a natural lifter and PEDs made all the difference.
ETA: I guess a further question here (and feel free to take a stab at it) is if the topic question is deemed to be true, how does this change strategies for gaining lean muscle mass in the formerly obese, whilst minimising fat regain?