在这项计划中，主人们要和宠物们一起进食，一起锻炼，一起称体重，而指导理论则是这种人和宠物亲密无间的生活方式有助于双方共同减肥。

Under the program, people and their pets eat together, exercise together, and weight in together, based on the theory that the buddy system will help pets and their owners lose weight.

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“调定点理论”(set - point theory)认为，肥胖人士的身体实际上可以“抵御”过多的体重。

This "set-point theory" argues that an obese person's body will actually "defend" an excessive weight.

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有很多理论可以解释为什么节食不起作用、为什么体重降不下来或迅速反弹：节食让你疲惫不堪；

There are plenty of theories for why diets don't work, why the pounds won't go away or they come back so quickly: Diets make you tired.

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