You may ask why should one exercise when you could just diet? Many people diet in a bid to lose weight however they forget that this results in short-term gains with possible long-term consequences. Consequences in the manner, that by depriving your body of nutrients, it enters into a "survival mode" and after dieting, your body will attempt to store as much energy from food as possible. So what often occurs is that people will lose weight by entering ridiculous rabbit food diets (Atkins Diet) of eating one leaf of lettuce a day or a bowl of gluten free, sugar free, carb free noodles (Superlite Shitake Noodles) but the consequences of this are generally negative and do not help your body. Let alone where are you even getting your essential nutrients and vitamins from? Imagine what that will do to your body in the long term from depriving yourself for so long? A total misconception is that when people refer to dieting what sparks to mind is of enjoying a cup of lettuce soup for weeks on end; however correct dieting would involve eating the right foods that will incorporate all the necessary vitamins, nutrients and of course most of all protein.
A little known fact about fat is that it never disappears from your body. What actually occurs is mitosis, where the fat cells overflow and divide into two cells. What does this mean? Well, for the rest of your life, you will have the same amount of fat cells in your body (Unless you get liposuction of course but have you seen the series that show how it's done? It looks like you getting skinned alive). What essentially occurs when you "lose fat" is your fat cells are shrinking.
|How mitosis works, A picture that I found on Google images and I have no clue what diploid cells are?|
So that is in a nutshell why you should exercise over dieting, but for maximum gains the best would be to diet correctly and have a complete exercise routine simultaneously.