The steps to the weight cycle are normal eating, weight gain, diet, metabolism slow-down, and end of the diet. But they repeat again and that’s the Yo-Yo effect. For example, Sherman Morrison talks about someone on the website healevate.com, saying, “In the 1990’s she got up to 237 pounds, dropped it back down to 160 in the early 2000’s, but then crept back up over 200. Recently, however, she shed 30 pounds using Weight Watchers.” Which means she first gained weight, then she lost weight, and finally she gained it back. Basically, Morrison is describing that the Yo-Yo effect is gaining and losing weight over and over again.