If you are gaining weight and you want to stop it than the first thing should be change of diet, among the most common factors of gaining weight is soft drinks.
Soft drinks not only gives you unnecessary extra calories but it also increases the risk of diabetes which kills thousands of people around the world.
They are also responsible for weaker and decaying tooth which occurs because of high sugar content in these drinks which youth consume on daily basis. After drinking cold drinks you teeth are under attack for at least 1 hour.
Other things which should never be part of your diet are snacks, cakes, fast food items which are oily and contain extra calories. These items should be replaced by healthy fruits and green vegetables which are rich in protein but low in calories.
By simply changing your diet you will decrease your weight and will become more healthy & fit.