If you are looking to lose weight, a good diet is essential. No matter how much you exercise throughout the day, you are not going to lose weight if you continuously take in more calories than your body normally needs. However, a good diet is often not going to be enough to resolve a struggle with obesity.
That is why we certainly advocate for a good diet, but we also want to make it perfectly clear that your diet needs to be an important component of a good overall weight loss strategy.
The most important concept that you have to take into consideration is the fact that you compare your calories in (meaning how many calories you ingest) versus the calories out (the calories that your body needs every day for basic functions and physical exercise). If you eat too many calories, it is going to lead to excess weight gain.