Now you should add weight for you. You need to eat lots and lots of protein and exercise to build muscle and might need to rest enough to assist in reviving lyrics.
Now you should gain weight first. You need to eat a lot of protein, and to exercise to build muscle. And may have enough rest to aid in muscle recovery.
Now you should increase your weight. You need to eat more protein and must exercise to build muscle. And may have enough rest to help in restoring the muscle.