wow, some pretty crappy research there. How much money and time did they spend to come to the conclusion that when you sit on your ***, you gain weight. researchers are like doctors. There are some high quality research studies - read something from New England Journal of Medicine, Science or Nature and then there are a lot of crappy ones - see these idiots.
It's a joke. They are trying to imply that siting on a couch makes you fatter than any other form of "doing nothing" And the premise of their research is that they "stretched" cells in a petri dish, so when you are sitting on the couch, the cells will stretch in the same fashion. Hate to tell these idiots, bit there are over 10 trillion cells in the body. So, when you are sitting prone, the fat cells or fat-precursor cells are not going to be stretching. They will be moving around like squeezing a water balloon.
OT: I was the guy who first debunked the masturbation myth. Lab coat and everything. Hours and hours of research. There is no positive correlation between good grades and "frequency".