Do you want to be a woman? ... girls practice vest line well. It is even more difficult to have abdominal muscles. Women's muscles are not as good as men's. If conditions permit, running in the gym consumes fat, equipment and strength, and you can also try boxing and swimming. Another person hangs upside down on the parallel bars and curls up with waist and abdomen strength (this is more dangerous, and there are parallel bars in schools or parks). The diet is vegetarian, vegetables, fruits and beef. 14 years old. Personally, it is better to grow up and exercise less than 120. /kloc-you can start to increase training after 0/8 years old.