Hopefully, that got your attention! Please watch the following video.
The secret to weight loss success is this:-
1. Formulate a good plan. A good plan is one that both works and is doable.
2. Stick to it!
3. Exercise mostly increases fitness, but it does increase energy expenditure by a significant amount. See Calories Burned - Walking: 3.5 mph (17 minutes per mile). A 250lb man walking for 90 minutes expends 756kcals.
The vast majority of people who eat "fast food" don't do the above. "Fast food" establishments use every trick in the book to get people to make bad food choices and consume as much as possible.
As people are reluctant to go back for more food (as they think that it makes them look greedy), super-sizing was invented, which allows people to eat twice as much food for less than twice as much cost.
Delicious aromas stimulate the appetite. Added sugar, salt & flavour enhancers increase the food reward.
Bright colours, cartoon characters and toys entice children.
Edward Bernays-style (emotion-targeted) marketing encourages people to visit "Fast food" establishments, make bad food choices and over-consume. See http://www.dailymotion.com/video/x2d29tf_the-century-of-the-self-part-1-of-4-happiness-machines_school , for more information.