The percentage of body fat

The gluttony changes fat mass – the percentage of fat in the body – for more than two years making it harder to keep weight off.

暴饮暴食会改变脂肪量——身体所含脂肪的百分比——两年有余脂肪量都无法回到正常水平。

That's hard to say, since the percentage of fat in elite swimmers may vary from 6% to 25% of body weight.

那很难说，因为优秀游泳运动员的脂肪与体重比例从6%到25%不等。

It is not just lack of sleep that negatively affects body fat percentage and the risk of chronic disease-poor sleep quality does as well.

不仅是睡觉不足会对身体的脂肪比带来负面影响并增加患慢性病的风险——低质量的睡眠也会导致这些。