Okay so here's something I found. It's been difficult using the searches I've put in as they all have the same keywords that pop up in every weight loss blog and site 🙄
This is taken from www.ontheregimen.com. not exactly BMJ but I'm going to work on getting some more valid sources:
*This seems backwards, you lose weight, yet your calorie maintenance goes up?
Let me explain. Once you are lean, your training efforts will primarily result in muscle gain (that’s what that partitioning was all about, remember?). Each pound of muscle requires 3-4x more calories than it’s equal weight in fat.
So, lose a bunch of fat, gain a bit of muscle and the result is that you get to eat more food.
Now, if you lose 100 pounds of fat and your total muscle mass remains the same, your maintenance will decrease a bit. But for most people, at some point during or after their weight loss journey, muscle mass will increase resulting in a net increase in calorie maintenance.
Additionally, research on bodybuilders (which applies to us non-meat heads too!) has shown that we can actually increase our calorie maintenance while maintaining the same weight over a period of time. By slowly and strategically increasing your food intake week after week, you can increase your maintenance by hundreds of calories*