I work in a country where food hygiene does not exist and I was constantly sick from either end, luckily rarely from both! I cannot cook as I live in a hotel. A bad diet I know but I have gone onto a bread diet consisting of local pita bread with banana or vegetable sandwiches and canned food such as tuna, mackerel or…
Arnold Schwarzenegger recommends it too. Personally I do it too and do feel some benefit. I was doing crunches to strengthen my stomach but had to stop due to a hernia which will be sewn up when I get to my optimal weight. http://slism.com/diet/draw-in-walking-exercises.html