You can do sit-ups, yoga, swimming and running according to your own situation, but you should pay attention to scientific exercise, step by step and stick to it for a long time.
I walk for more than half an hour every night. Before I leave, I massage my stomach with English slimming massage.
We should also pay attention to reducing the total intake properly under the premise of ensuring a balanced nutrition, eating seven minutes full every meal, not sitting for half an hour after meals, and exercising moderately for half an hour after meals.