Yeah my ISTj dad is quite overweight. He has terrible eating habits if he sees an offer of 10 packets of chips for cheap he will have to buy it. Quantity over quality.

Hes just had a health scare so its finally hit home. Hes shedding the pounds fast as hes going to the gym 5 times a week. Still for a 62 year old he still plays golf etc so thats not too bad. Perhaps S types may be more likely to put on weight but i think they are more active so can loose it easier too.