Have you gained weight recently? It will be easier to lose weight if you gain weight recently. If you do 30 sit-ups every day for three days, you can lose weight and control your diet. Also pay attention to sit-ups instead of sit-ups, because sit-ups are not good for the lumbar spine, so just do sit-ups and feel the meat on your stomach squeezed. Or you can drink some lotus leaf tea or black oolong tea, which are very effective thin-bellied tea. If you find it useful, adopt it!