在节食当天并不是什么都不吃，而且通过摄入更低的热量来达到减肥的目的；通常女生当天摄入500大卡，男生摄入600大卡的热量。具体如下：
1、在轻断食的当天，还是奉行少吃多餐的原则。
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2、早上9点，可以开吃第一餐，这一餐，可以吃1个中等的苹果+1个鸡蛋。
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3、第二顿可以放在中午的12点，和正常吃饭的时间一样；可以吃25g燕麦片，将燕麦片泡热水或者煮熟，这就要根据燕麦片的使用方法了。
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4、然后下午4点是一天中最容易饿的时候，这时候可以喝240ml的牛奶，如果天气冷，记得将牛奶加热一下。
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5、最后一餐就是晚饭了，在晚上6点的时候，可以吃一小碗黑米粥+150g蔬菜。
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注意事项：
1、减肥一定要注意少吃多餐。
2、切勿突然一天甚至一礼拜突然断食，这样即使减肥成功了，反弹也十分快。