Is it really worth exercising?

Exercise is worth it. I would say, if you were on a good diet/meal plan and exercising for 2 months, you should have lost a few pounds...assuming you need to. You may not need to. If you do need to lose weight and you having lost after 2 months of diet and exercise, you need to change something you are doing. Exercise is worth it because health is not only about the number on the scale (which is arbitrary in most cases, BTW). Having a strong heart and strong body is very important too. Young people care more about appearance in a bathing suit that "health". I will say, a toned body is much more attractive than a "skinny fat" body.

I wrote this for a man...but it applies to women. In general you want longer thinner lean muscle...not bulk (but in the right spts, bulk can look good) at the end you will see a rep suggestion of 12/8 women should probably change this to 15/10. Good Luck! Previous response:
I am currently in the same boat. I started at 336 and I'm now down to 265. Setting your calorie goal in MFP is important, and creating a calorie deficit will help you lose weight. But do not underestimate the importance of exercise. While MFP only calculates cardio exercise for additional exercise calories earned, strength training is far more important in the long run. Not only does it burn calories (MFP does jot count them because they are much harder to calculate), but every pound of lean muscle also burns about 75 calories a day, even at rest. Also, especially if you are diabetic, and even if not, toned muscle utilizes insulin far better thus burning the calories you eat more efficiently. My insulin intake went from 140 units per day and is already down to 25 in just a matter of months back at the gym. It started to decline steeply in just 2 weeks, showing I was using insulin better. Plus muscle looks good, and if you can put on 10 pounds of lean muscle you will burn about 750 extra calories a day. That's over a pound of fat every 5 days. For most men it is not that difficult to put on 10 pounds of muscle, and you should not look at just your weight as a measure of fitness. You are better off at a muscular 210 than you are at a flabby 200... and the extra muscle will make it much easier to maintain your weight. I have been fit and muscular much of my life, but I slacked off after I got married, developing diabetes and other health problems. I have lost weight dieting before, but my health problems did not really start to subside until I started taking working out again very seriously. You don't have to do a lot. I strength train every other day, and do cardio everyday. I know it sounds like a lot, but here's a trick. You probably watch a fair about of television. Get a Netflix subscription and choose a program that you will only watch (on a phone or tablet) while doing your cardio. Find something addictive, binge worthy. I started with Breaking Bad which you can download so you don't even need an internet connection at the gym. Episodes are 47 minutes. Doing 47 minutes on an elliptical or a treadmill goes much faster when you are distracted in this way. Don't worry about speed, figure out your target heart rate and go from there. Try to keep your heart rate in that zone and you will find that suddenly you have to up your game to reach that heart rate. Watching Breaking Bad I logged over 400 miles on various machines. For strength training right now I only do 2 sets per body part every other day, and I still have not started on any core exercise, the abdomen and lower back, as I carry most of my excess weight there and it is difficult to do these. That will come later. I would also suggest super setting and circuit training to save some time. Super setting is when you work opposing muscle groups, so you do not have to rest as long between sets. So you do a set for the chest that and then a set for the back then another for the chest and then another for the back. Biceps and triceps is another good group to oppose each other. I then Do shoulders and legs, which is a combination circuit and superset. Shoulders and legs are not related, and the calf is not really related much to the upper leg. So that sort of makes it a circuit as opposed to a superset. However, when I do this routine and instead of doing squats or leg presses I do leg extensions and leg curls, that is a superset in the middle of the circuit. It also adds an exercise to my routine. Every 2 to 3 weeks you should change the exercises you are doing for each muscle group. So for a few weeks I will do a routine such as bench presses and rows two sets each, and I will switch to flies and lat pull-downs for a couple of weeks. I will do leg presses for a couple of weeks, and then switch to leg extensions and leg curls. Unfortunately calf raises are the only exercise I can think to do for the calf, but you could do them the different ways and change the angle a bit. You should also change up your cardio. I generally do treadmill on the days that I Strength train, and elliptical on the days that I do not. You can do this quicker than 40 or 50 minutes, but the longer you go the more calories you earn to eat back. As they said above, only eat back about 50% of the calories you earn. If you are using machines, be sure to enter your current weight to get a more accurate calorie count, but even that will NOT be spot-on, that's why you should not eat back more than 50%. Always get your heart rate into the target zone for a minimum of 20 minutes. When I do a short workout I usually find a half-hour program to watch (Portlandia right now) I pump the elliptical very hard for the first 2 minutes and get my heart rate up, and then I maintain that for 21 or 22 minutes. I will do this sometimes on days I Strength train because for whatever reason I don't have the time to be in the gym that long. My gym is Cheap, Planet Fitness only $10 a month. If you can't afford a gym there are many exercises you can do at home with no weights at all, or with a cheap dumbbell set you can get at a garage sale. Walking is free...just keep a good pace and check your heart rate. Even if you can't maintain a HR at first, keep moving. The bottom line is you need to get moving and do something or maintaining any weight loss will be nearly impossible. And this is not a diet, it is a new lifestyle. You will always have to watch your portions and track your weight and your Fitness, and adjust accordingly. That doesn't mean you can never go to a party again, it just means that the week before or the week after you may have to be a little more strict with yourself. I know I went on for a while, but this is really important stuff and you cannot underestimate it. I did not gain my weight until I stopped my workouts. I really feel that activity is the key Fitness. Calories are important, but activity will burn those calories more effectively. START OFF SLOW, and build up as you udentify your limits. I woyld suggest abkut 12 reps per set to start, then add weight until you can't do 12...but can do at least 8. Stay there until you can do 12 again then add a few pounds. For cardiovascular start easy for a few weeks but monitor your heart, then push a little harder each time until you are maintaining 75%-85% of your maximum heart rate. Do some research to calculate this and determine your most appropriate zone. We can take control of this thing, and it's not nearly as hard as it seems when you first start. Good luck, and feel free to contact me directly if you need any support or advice. I am on the same Journey, but managed to stay fit for a very long time after a pudgy childhood. I simply forgot my body's natural tendencies and let them get away from me. There is no magic pill or potion, just diligence and determination. Best to you.

Well you can't be fit without exercise...

I'm only on my second consecutive day at the gym, but I felt great after. I'm the heaviest I've ever been, and my muscles are going on me. Can't walk far, my gut is in the way,my breathing isnt any great shakes, either. When I lost 65lbs 7 years ago, the sense of accomplishment was more so than the weightloss. I could kick *kitten*.
Exercise will only be worth it if it fits your goals. If it doesn't fit yours, I would reevaluate and move on.