The weight of your body is quite symmetrical, and you don't know your strength base. Generally, it is 15kg/ dumbbell in the market, and the weight can be adjusted freely by 2KG 15KG. The price, affected by the financial crisis, is expected to drop, hehe, hehe. It is strongly recommended that you buy stainless steel or galvanized steel instead of pig iron plastic packaging. Although the latter is relatively cheap, it generally works well and has a relatively short service life.
Bird action is really a chest muscle exercise, but it needs the protection of others. Warm up with your own small strength, but someone will protect the high-intensity strength training, which will easily damage your shoulder ligament. This action is best based on bench press (barbell). I worked as an intern a few years ago. I am 186 and weigh 75KG. Then the bench press is about 100KG/6 (the limit), which is about 35kg/ dumbbell weight compared with the flat bird in the same period last year (because I haven't practiced my chest muscles).
Fitness strength training is so little, just to reach your final weight, do some exercises to warm up and relax. But warm-up and relaxation can't be ignored, otherwise it will do more harm than good to the human body.
Finally, it is strongly recommended that you study for about a month and sign up for strength training in a professional gym. Someone has to protect it.
Answer, take me. Oh, I type word by word. You can contact me if you have any questions about this.