text: hey some help on gaining weight in muscle? i am 5'5", 101lbs and 14 yrs old. i want to gain some weight, but i want it to be healthy muscle weight, not just fat weight (so dont just answer with "just eat a lot" or w/e.) b/c that doesnt work anyway... right now im on a swim team and i practice about 5 days a week. i dont do any other exercise beside that but will swimming be enough workout to increase muscle or what do i  have to do? i dont want to just gain fat weight. here im a little younger then you but i had the same problem i was 4"5 and i waid 59 lb i was scary skiny my doctor told me to have  carnation instant brakefast and then 2 months later i was 72 lb and i excersized every day for half an hour to keep in shape!