求救：这句英语怎么理解呢？--------难句分析

浅唱之魂

文章的主旨说的是： 对于青春期的胖女生，就算减肥了，也还是对自己不够自信。
以下是其中一段，原文在：http://www.sciencedaily.com/releases/2012/03/120322113521.htm

"We did not show that self-esteem stayed flat because girls continued to see themselves as heavy, but just that they happened at the same time," she said. "Even so, providing mental health assistance during the weight loss process could be a benefit. Understanding and addressing body image, identity and self-esteem issues could ultimately help keep the weight off. Why keep dieting and exercising if you are still going to see yourself as fat?"
这段话怎么理解呢？特别是第一句。

麻烦大家帮帮忙。谢谢

浅唱之魂

可以这样理解不？

我们没有显示，自尊心持续萧条是因为女孩子们认为他们还是很胖；但是他们是发生在同一时间的。
即使是这样，在他们减肥的过程中，提供一些心理健康的帮助有一点好处。理解和处理自己身材，身份，
自尊的问题可以最终帮助把多余的脂肪给赶走。如果你仍然认为看待自己是胖的，为什么还要节食和锻炼呢？