How to help someone to get fitter or even gain weight :O

An active adult should have 2100 calories (Male)/ 2000 calories (Female)
An moderate adult should have 1800 calories/1768 calories
An unactive adult should have 1500 calories/1436 calories

An under weight adult should have 2000 calories a day male or female
an normal weight adult should have 1800 calories
an overweight adult should have 1500 calories
an obese adult should have 1300-1400 calories MAX