Well first off we really have insufficient information here to make any kind of recommendations. Knowing absolutely nothing about your current spot, your goals, your diet, lifestyle, etc, makes it difficult to say. However, I will tell you this that long cardio/runs on a calorie restricted diet is a road to no where. If you are capable of doing it, and not already doing it, resistance training is the better way to change body composition. Each additional pound of muscle you gain burns an extra 50 calories a day. For example, gain 10 pounds of muscle, burn an extra 500 calories a day just to maintain that muscle. For most people a 500 calorie a day difference is enough to lose a pound a week as long as the diet is sane. Running by itself tends to be catabolic, it breaks down muscle instead of building it, thus long runs without weights can reduce your amount of muscle and reduce your metabolism, especially on a calorie reduced diet. However, a good solid base of weight training with reasonable cardio, especially high intensity interval training, along with a sane balanced diet is the road to success.
I hope this helps you man.