You can search for that simple arm reduction on the Internet, which is a bit like yoga. You can choose anything you like.
It should be noted that generally, 20 people are in a group, and they do 3 groups every day, that is, they do 20 times in a row and then do 20 such actions after 3 minutes' rest. If you are not used to it at first, you can do 4 groups in one group, 2 groups in the morning and 2 groups in the afternoon, or even 5 groups in one group. This can be adjusted by yourself, but it cannot be lower than 10.
1~2 weeks later, your arm will become very loose. At this time, you need to do strength exercises and buy a dumbbell. If you want to save money, you can use 600ML empty bottled water as dumbbells. You can also search online, so I won't say much.
Be sure to do muscle stretching after exercise, which can relax muscles and stretch muscle lines. You can also search online ~ If you are a student, you can also ask your PE teacher what to do after exercise.
If possible, you can buy base oil (grape seed oil) and massage after bathing.
That's how I succeeded ~
If you have money, you can go to a professional gym to make MPG M6 (a slimming instrument). It's very comfortable, but it's also expensive and has a good effect on firming the skin.