Exercise should develop in an all-round way. The most difficult part is the pectoral muscle, and the action is dumbbell bench press. This action should be able to lift a pair of dumbbells of about 50 kg within half a year (that is, a single dumbbell of 25 kg), so the long-term development of a single dumbbell should be about 30 kg (a pair of ***60 kg). If you can persist and endure hardships, this weight can be easily achieved in one year. It's best to buy the kind of electroplating.

No matter how heavy it is, it is unnecessary. After this weight, I personally think that family exercise can no longer meet your needs, and you should consider going to the gym for professional training.