text: is losing 10 pounds in 2 months a realistic goal? and if so, what kind of exercises or cardio can i do? i'm a 14 yr old girl with a height of 6' 4 (160cm) and i weigh like 110 pounds. i'm trying to lose about 10 pounds or more right now since it's summer vacation and i have time. what are some cardio or exercises that i can do  to lose weight without gaining it all back when i stop exercising? right now, my eating habits wouldn't be exactly called "healthy" but it's going to be when i'm on my diet and doing all the cardio and exercises and stuff during this summer, then, after losing 10pounds, i'll just watch what i'm eating more. swimming, i know, is an option, but running i heard would make my thigh and butt big when i stop (and that would be bad because they're already big and well, fat). wait do you mean 5'4? i could not image you even being alive at 110 at 6'4. but i am assuming you are 5'4 and it is a pretty realistic goal to make. do whatever exercises you want, anything that you enjoy, hiking, running, tennis, swimming, biking, ect. you should always do at least twice as much cardio than weight lifting. i would suugest doing pilates and maybe yoga to get toned, and also try weight lifting a little. and cardio depending on what you do could be betweeen 2-5 hours a day at least i woud think. like tennis i do 3-4 hours a day. but running i would only do about 1/2 hour or an hour, but you would have to do more than just running. if you do not want to bulk up do pilates and yoga instead of weight lifting, and just weight lift your arms a little. running might bulk you up so try tennis or walking, hiking, i dont know i would not worry too much about bulking up, if you are burinig fat at the same time they wont get bigger, they will just get more muscular and less jiggly. eating habits, dont change them all at once, try eating more fruits and veggies as a snack instead of chips and cookies, and for meals eat whole grains and protein.