If you want to have lines, the first choice for exercise must be chest muscles and abdominal muscles, and it is good to train a mermaid figure.

I recommend push-ups and sit-ups

Push-ups are in groups of 30, 5 groups a day.

One set of sit-ups 100, I use five sets of flippers a day, and the effect is very good.

The initial amount of exercise can be reduced a little, and the long-term exercise effect will be great.

Remember to pay attention to breathing and don't hold your breath when practicing. It's normal for your muscles to get sore during early training. The important thing is to persist and do what you can.