Sorry to be the one to burst one of the biggest myths of the fitness industry. Diet and Exercise do not work.
Yes, you may lose any number of pounds through the combination of diet and exercise, but as a lifestyle it is simply not sustainable. You will not find one elite athlete anywhere in the world that follows a program of “diet and exercise”.
Diet and exercise programs are designed to be non-sustainable. That way when you “fail” you can be convinced that it is your weakness and nothing to do with the program. That way you can be sold the next new gimmick program that comes along.