According to Wikipedia, yoyo dieting is when -
The dieter is initially successful in the pursuit of weight loss but is unsuccessful in maintaining the loss long-term and begins to gain the weight back. The dieter then seeks to lose the regained weight, and the cycle begins again.
The article goes on to talk about what happens and considers possible reasons for why, but the sentence, “Over time, however, the limits imposed by such extreme diets cause effects such as depression or fatigue that make the diet impossible to sustain.” is simplistic in my opinion.
I think that it isn’t the extremeness of the diet that results in it’s ultimate failure. I think that failure comes because we just don’t have the support for weight maintenance that we have for weight loss. It is assumed that losing weight is the hard part (“I lost 50 pounds!” someone might say) — that’s the achievement. And that’s what all the commercial diet programs are aimed at. Continue reading