Between the two, exercise is probably more important than diet. Some people did manage to lose substantial body weight with strict diet only, but their bellies are not tightened enough and are very prone to gain fat again once they return to normal diet. The correct type of exercise you need to take is called "interval" training, which means alternating different exercises at different intensities and duration. Fitness experts will tell you that a combined exercise program works best for those who would like to reduce overall body fat but with a focus on one specific area of the body. To go for "interval" training, you can do weight training for an hour on the first day, and cardiovascular training for an hour the next day, and then weight training again on the following day. In each exercise session, you can vary the intensity by walking for the first 5 minutes, running in the next minute, walking again for the following 3 minutes, and running for another 2 minutes, and so on.
Instead of doing cardio exercise along, you should add strength training into your fitness routine. Strength training has the proven effect of toning body muscles including your abs. So, use strength training to target areas of your body you want to tone and cardio training to lose overall body fat. The combination of the two major types of exercise will get you the quickest results possible.
A good diet plan is a great supplement to your gym activity. Iit not only makes sure you do not regain the calorie burnt by eating a lot, but may also help you to lose more weight by taking less calorie than you burn. However, you should do it properly. If you do not take enough nutrition, you will not have the energy to exercise and thereby effectively lose belly fat. On the other hand, you should not go on diet only without exercise, as your body will eventually adapt to lower calorie intake by lowering consumption. If that happens, you will find it harder to lose weight in future. In case you do not like to struggle with your stomach, you may incorporate some stretch exercise in your routine, as stretch exercise has been found to be able to help form a healthy eating habit the natural way.
To conclude, the combination of healthy diet and exercise is the best way to lose belly fat. To get started, you can make up your plan with the instructions by gym coaches or some reputable fitness guides. Usually, by following a good plan, you can see some positive results within a month. Keep in mind though, the key to keep your flat mid-section is to stick to a healthy life style in the long run.