Exercising and no weight loss

What are you eating? Are they nutritionally dense foods (fruits, vegetables, lean protiens, and good fats (olive oil, avacado, fish oils)or junk/processed food?)

Are you eating 1200 calories plus those you've earned from exercise... Or are you eating just 1200 calories per day?

How much sodium are you consuming?

First, I'm sure you know of the "starvation mode". Depriving yourself of calories that you need on a daily basis only results in gain or no loss. Cutting yourself down from the bare minimum would only result in more frustration, I would think. I had an incident last week that caused concern, as I gained 3.5 pounds in a week. When looking at the week in review, I had upped my exercise minutes and found myself eating those extra calories that I burned. I found that if I eat around a third of what I burned, then I'm good. I did just that and last week I lost all that I gained PLUS 1.4! Another thing that helped me was something my wife showed me...when doing cardio, every 5 minutes for a 1 minute interval, go fast...then go back to your normal pace. It speeds up your metabolism, burning calories faster than normal.

Well, exercise is a means to assist weight loss with proper diet and nutrition. Not as a means exclusively to lose weight with a low cal diet.

It's a balance. People tend to think, if I just eat the minimum, then work out a ton! I will lose that much faster. Not the case.

In your example: you have 1200 c your eating. Your burning lets say 600c. So your net in is 600. WAY too low, to not only support any muscles you could have gained, but your decreasing your performance. Your compromising energy to your body functions. As a result your metabolism lowers to try to eliminate unnecessary (relative term) functions to meet this new energy expenditure demand. Your body is thinking short term. While your thinking long term. Eventually you'll lose. (not weight)

This is where the "eat back your exercise cals" comes from. If your eating back the 600, plus the 1200 your set to already. Your eating 1800c a day when working out. This is extremely average. You will lose weight this way, you will also increase athletic performance and giving you all the benefits of exercise properly.

Make sure, that the cals you do eat, are good choices. Nutritious foods, high in fibers, nutrition, proteins. Things like whole foods, while avoiding empty cals like hot pockets and boxed meals. You need the most bang for your buck with this routine. Your mind, body, weight loss success will thank you in the long run.

Also, the P90X Lean routine might be worth considering. It really jacks your metabolism and provides a great calorie burn by using all different large muscle groups without overdoing it on any. Sometimes when you do the same thing over and over your body gets used to it and you become surprisingly efficient, wheras P90lean mixes it up and seems to just keep the calories burning.

^This. Although your exercise plan is very active, I would actually get involved in a proven & created routine exercise plan. I was hitting the gym for weeks with very little results. When I started the Body for Life program I started losing weight again. I'd recommend checking into a program for an actual gym routine or a program like P90X like the poster above me said.

Edited to add: Don't skip the weights. Lifting weights builds muscle which eats fat. It's a common mistake to believe cardio only will shed the lbs. It can of course help you lose weight but building muscle burns fat off. I agree that free weights are much better than machines. The HIT training another poster talked about is really awesome. It is similar to what Body for Life does.