Does it take a while to get a flat stomach ?
Some people no matter how much they try aren't naturally inclined to have a flat stomoch and some people have trouble with bloatign and their stomoch may expand after eating (fennel tea is quite good to alleviate bloating). If you eat healthily and exercise yet dont achieve a completely flat stomoch dont be too upset or push yourself to extremes. Some girls like a bit of a tummy on a guy anyway :)
It all depends on how long you work out a week and if you stick to a healthy diet. It took me 6 weeks.
2 weeks...12-13 days if you push