The majority of your calories are burnt during your daily activities, not during your workout (unless you are a real athlete and your workout is not just a daily visit to the gym). When you log your activities you have to remember that whatever you burn in the gym is replacing the number of calories you burn by doing something else, not adding, so the net difference is lower. So if you jog for an hour but then watch TV for 5 hours, you can still burn less than if you walk for 6 hours or do some chores at the house.
The first thing you lose on a diet is your sense of humor. ~ Author Unknown
It doesn’t matter what diet you follow… What matters is what makes you follow your diet. ~ Tom Venuto