How to gain weight ? A question which rarely asked in this world where obesity dominates all the other health issues. But only a person who is underweight will understand the seriousness of it. Gaining weight is equally hard as is losing weight. Both problems require you to exercise properly and eat healthy food. Lets find out how to gain weight. The reasons for being underweight – Eating disorders Chronic diseases Lack of physical activity. Heredity There are chances that an underweight person will have lower immunity levels and can easily fall prey to illness and infections. The rate of recovery in underweight people is slower than in healthy individuals.Thus there is a need for an underweight individual to gain weight and become fit. Here are some tips on how to gain weight:- How to gain weight – • Counting calories : Calculate your basic calorie requirement.You want to know how to gain weight ? You will have to increase your ...