And again, I'd stress the importance of not relying on someone else's interpretation of studies, PubMed has a lot of great info on all the various studies published around the world that are considered to be peer reviewed. I will say it is a bit of abuse of the scientific method to take 1 study as proof of something as you do need repeatable evidence.
From what I've read, artificial sweeteners can affect some people and not others. One way they may affect people is by actually making them hungrier since artificial sweeteners are non-nutrient. In that case, it may be better to just eat sugar and count your calories.
You can't out-exercise poor eating habits.