You are right that conventional medical understanding is that once you reach adulthood the no. of fat cells is the same. UNLESS you put on so much weight, the body will make new fat cells. That is the orthodox medical understanding.
Yup if you critically analyse the first study (I also came to the same conclusions), there are two possible explanations for the uneven redistribution of fat:
1. When the people gained fat, they gained new fat cells in the other areas where they are predisposed to have more fat cells. The equilibrium theory which I proposed, which is that the body fights to keep the number of fat cells constant.
OR 2. When the people gained fat, they gained an increase in volume of the fat cells in those other areas BECAUSE genetically, they are predisposed to fat in those area (different receptors). Eg, if you liposuctioned your abdomen, you might find the fat came back to your arms because the arm fat cells became larger; the fat did not go to your face due to genetics. (different receptors for different adipose cells)
The second study, I did not read it. Did the fat come back, but was evenly distributed?
Re, abdominal fat. I do not have much abdominal fat. Always had a six pack. So I do not know why people say that men put on fat at the abdomen. I am just challenging the common understanding. I am saying that not every male puts fat at the abdomen. Women put on more fat on the abdomen - look at most porn stars (which aren't my type). so fat at the abdomen. (women also have a higher body fat percent, but it is unacceptable for a girl to be fatter than me at the abdomen)
Irregardless, this is off-topic (yes irregardless is a word according to Merriam-Webster). What module did you take In university? Also let me know your thoughts about doing 8 cm tibia.