Q: must a person exercize in gym before he loses weight or can he do other excercising such as playing foootball jogging without going to the labgbne

A: Heavy whole-body weight training (for which gym provides equipment) is the single best fat-burner as far as physical activity, but it's certainly not the only way to lose fat and keep it off. Recreational sports are also very good, especially power sports like football or rugby. Swimming is an excellent form of cardio. If you can't do any of them, then even plain walking or jogging can take you a long way.

Any of these forms of physical activity are of course most effective when combined with a fat-burning diet. You can get a custom fat-burning diet by filling out http://www.mikesfitness.com/content/fitnessguide and specifying 'Lose Fat' as your goal.