Do you exercise?
I would add some weight training. Specifically, the old “breathing squat and pullover” routine that is the traditional advice to hard-gainers to build up.
What you want is short, intense bouts of high-level exertion, interspersed with completely adequate rest periods.
Do the routine three times a week on non-consecutive days - Monday, Wednesday, and Friday (or Tuesday, Thursday, Saturday).
Warm up completely before you begin. (See your doctor before beginning any exercise routine, etc., etc.)
You do a very light set of 8-10 freehand squats with no weight. Rest about a minute and a half.
Then, using a very light weight (something you can easily handle for ten reps), you will do one set of twenty, taking at least three deep breaths (deep enough so that the bar moves on your shoulders) in between each rep. It will be very hard work. Keep your back absolutely flat, take a fairly wide stance, go down so that the tops of your thighs are roughly parallel to the floor. Do this inside a power rack, or have someone spot you who is paying attention. But get twenty reps. If you have to pause between reps to recharge, fine, but go all the way to twenty. If you can’t squat with an empty bar (standard bar is about 44 pounds), use a couple of dumbbells.
Once you finish the set, immediately, with no pause at all, do one set of pullovers with a very light weight. Have the bench and dumbbell set up so that you can do the pullovers with no pause at all.
When you are done, do not sit down or stand around. Walk slowly around while your breathing comes back to normal. It will take a while - this is a super intense exercise. That’s the idea.
Then complete your workout with the following - [ul][li]Bench press - 1-2 sets of 8[]Lat machine pulldowns or dumbbell bent over rows or use a barbell - 1-2 sets of 8[]Calf raises - 1 set of 20[]Barbell curl - 1 set of 8[]Crunches - 1 set to failure[/ul]That’s it. [/li]
If milk agrees with you, try adding two glasses of skim milk to your diet per day. If it doesn’t, try non-fat yogurt. You don’t have to stuff yourself, just add about two forkfuls of food to every meal over what you are eating now.
I would not recommend adding a lot of high-fat foods to your diet, either. Concentrate on carbohydrates (bread, pasta, rice) and protein, so you add the kind of weight you want, not a lot of fat. Eat three meals a day and two snacks, but make them all healthy meals.
Ignore the comments you will get about how lucky you are to be underweight. Just take this as an opportunity to make yourself 100% more healthy and attractive by improving your body.
Regards,
Shodan