There is no such thing as spot fat reduction,so doing sit up is
useless,the body will never only burn fat at a specific location
just as it will never deposit all fats at one postion.
So either you do cardio exercises like running,swimming,cycling and
other such or your stomach fats will remain.
And after that fats are gone thru cardio,if you want to train your
abs to be visible,doing sit up will be useless,sit up uses more of
your thigh muscle to lift your body up,so little effect felt on
your abs,doing crunches is what you need
