Hi very fine crux of information there i found, i see this sometimes as it is more because of the genes of a person as there are many friends of mine who get on weight quickly even they are on restricted diet and few buddys don't show any positive trend even they follow chubby diet. So , as per me its your hard work as well as your gene work....so we must enjoy our life with an eye on our preferences, cheers!
RE: How the body gain weight.