Considering my sedentary lifestyle, all I did was stop the junk food then switched to healthier food including a lot of fruits, walked to all my classes, also I realized I was eating food in large amounts so I toned it down a bit to regular sized meals. You would have to individualize...find out what's causing the weight gain and tackle accordingly. For me it was junk food and lack of any form of exercise (even strolling). I would be happy to discuss it more in details with you.