No matter what means you use to lose weight, you may gain weight again. Just like no matter how you recite words, if you don't use English, you will forget them.

The first suggestion for you is to continue to exercise after losing weight successfully, but you can reduce it appropriately according to your own time and situation.

The second is to change your bad habits, such as loving sweets and being greasy. The second is to actively cultivate some good personal habits that are conducive to physical fitness, such as standing for half an hour after meals.