Soft drinks contain very high amounts of sugar which increases weight, phosphoric acid & caffeine which cause osteoporosis, pesticides which are very harmful for health. You can instead have coconut water, buttermilk, lassi, milk, fresh fruit juice. Exercise daily for an hour. Include some sports in your daily routine. Increase your physical activity level. Have plenty of whole fruits, raw vegetables & water. Avoid junk/ street/ fast/ processed/ packaged/ sweet foods/ chocolates/ ice cream/ sugar/ excess salt.