I dont see the deal with keeping weight down. It may just be my fantastic teenage high metabolism, but I work about 12 hour days (9.15-21.45) approx. and every day I eat something unhealthy (chips and sausage) because that is just accross the road from work. And the end of my long day, I have a couple of pints at the local pub and then a kebab from the takeaway. The most exercise I get is the 10 minute walk to and from work. I am 5'10" (about 178cm) and weigh about 70-75kg. Easy peasy.