Is it a girl or a boy? Excuse me, do you have any fat accumulation in your abdomen now? If you are a boy, I suggest you do push-ups! If you are a girl, if you already have fat, then sit-ups cannot lose your existing fat. Doing it for a long time can only ensure that new fat will not accumulate. The first two muscles in your stomach are not easy to practice unless you are thin! Also, if you start, don't stop replenishing enough every day. As for how effective it is, there is no conclusion. It usually takes more than 30 minutes to take effect. If your movements are standard, you may do 50, if you are quick, you may do 200. If you really want to use sit-ups to lose abdominal fat, it is recommended to buy equipment and pay attention to whether the angle and radian are comfortable! Get up and make one with equipment, which can achieve the effect of 100 in bed! But be careful not to strain! Don't do sit-ups on the hard floor, it's easy to hurt your spine, and don't sit on the soft bed, it won't work! My girl insisted on sit-ups for 65,438+00 years, and achieved the following results: I started naturally without load, and 65,438+000 was my lowest. Usually I stop for 30 minutes in a row, and then rest for 30 minutes. There are only two muscles, and abdominal fat still exists. After giving up, even two muscles have gained weight, and almost no muscles can be seen! Ha ha! Fortunately, my body shape has always been very standard. I have always been an athlete. I have a lot of muscles in my arms and legs. I have stopped exercising for many years. In the process of gradually losing muscles, it is terrible for girls to have too many muscles! In addition, pay attention to a reasonable diet and do more exercise! It is recommended to practice yoga. The effect is very good. Personally like it! !