genuinely interested to see some scholarly articles (or at least review of scholarly articles) that prove or disprove whether or not "exchange" (ie, fat off and muscle on at the same time) does actually occur. and if so, in what sort of quantities?
as mr powahz suggests, case A and case C are probably commonly experienced. I'm currently in eating at what i *think* is a calorie deficit (at least it was 2 months ago when i was doing less resistance training), but my weight is staying relatively stable, my lifts are going up (slowly) and i feel like i'm carrying less fat but it's impossible for me to know precisely what's going on wrt composition. definitely not proof of "exchange". i'm not stressing it though - i'm just training consistently, hitting my protein target, staying under my fat, carb and cal targets and just accepting whatever happens.
also, getting stronger doesn't mean that you've gained muscle - strength is a combination of muscle cross-section and your central nervous system.
as mr powahz suggests, case A and case C are probably commonly experienced. I'm currently in eating at what i *think* is a calorie deficit (at least it was 2 months ago when i was doing less resistance training), but my weight is staying relatively stable, my lifts are going up (slowly) and i feel like i'm carrying less fat but it's impossible for me to know precisely what's going on wrt composition. definitely not proof of "exchange". i'm not stressing it though - i'm just training consistently, hitting my protein target, staying under my fat, carb and cal targets and just accepting whatever happens.
also, getting stronger doesn't mean that you've gained muscle - strength is a combination of muscle cross-section and your central nervous system.