aerobics & Lifting..still gaining weight, help please

[Velatrish]

In january 04 I joined a fitness club to tone muscle, and lose about 10 pounds (i was 135lb at the time). I am now 5'4 and weigh 145 . I have been doing aerobics (stepper, bikes and jogging) at least 5 days a week for 20 min a day. I also go to kick boxing twice a week, and lift weights 4-5 times a week. When I lift, i lift moderate weights until I can lift them any more, i rest, then do it 1 more time. I am a little confused as to why I am gaining weight (according to the scale, but my clothes are fitting about the same). I have not changed my eating habits too much...I dont count calories, I love sweets and the convience of fast food. My goal, now, is to lose 20 pounds...but im not sure how to go about this :confused: . Do I stop lifting weights? DO more or less cardio? Do I try to start a more disciplined calorie intake diet? Any advice that you all have would be greatly appreciated.
Thanks in advance : !!

[ajarvis]

Your diet will play a big factor in how much weight you lose and how soon. If you are gaining weight and you don't feel you're getting bigger (clothes fit the same etc) then you are probably gaining muscle weight.. But you won't lose your body fat until you evaluate and change how you eat.