My routine weight train is 3 sets of should press, 3 sets bisec ,3 sets chest, 3 sets of stomach, 3 sets of back ,each sets is 12 reps. I found that my weight loss process is too slow comparing to the other. I feel that I lost some patience right now.
It sounds like you are doing a kind of circuit training, kind of doing your whole body in one session. Also, it sounds like you are a female? Below is a really good group of articles to check out. You might be able to find more as well doing a search on that site about areas you are trying to improve as well. I'm not really sure... you could explore the idea of going to split bodypart training (As shown below in my routine). It might give that interest kick it sounds like you need? My girlfriend works out with me and she is 5'-0" at 98lbs, she works out all the days below with me except on Tuesdays... Legs scare her, lol. And she just needs to put some size on her upper frame because she seems to carry her weight in her lower body more, but her lower body is my favorite part though!
If you haven't tried it yet... I think you will have a lot of fun with the more Bodypart day splits. With this approach you might want to pick three of four movements per bodypart, depending on the size of the muscle group. So, if you decided to do Chest/Biceps or whatever for Monday, your day might look something like this -
Chest Seated Machine Presses-3 sets
Incline DB Presses-3 sets
Machine Flys-3 sets
Biceps Standing Cambered-Bar Curl-2 sets
DB Curls-2 sets
One-Arm DB Concentration Curls-2 sets
That should only take you around 45-60 minutes, if that... so you could also do a couple of sets of abs or whatever and then hit the treadmill for like a half hour or whatever. I'm not sure, I'm no trainer... I know when Lisa started working out with me this way she really started to enjoy herself and the pump she got from lifting the weights and feeling the blood get into the muscle. You could organize a split in a three-four-or five day fasion... whatever you think you could handle. With this approach I think you will see a bog difference in your whole upper body. You'll start to feel how everything is connected and when working one muscle group you can't help but hit other ones. When working your chest... your shoulders and triceps are forced to work just as hard in the pressing movements, and you may feel your abs coming in to help with certain pulldown movements for your Lats, etc.... Again though, I think it's all a balance game in the long run... with the diet/cardio/weight training all in check everything comes together. Hope this helps... or I might be way off?

See ya.
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