The weight selection of bench press dumbbells depends on your personal ability and goals. Generally speaking, if you can easily complete 8- 12 self-cultivation repetitions, then your weight can be increased appropriately. If you finish less than 8 repetitions or it is difficult to finish the last few repetitions, you should reduce the weight appropriately. Before adding weight, please make sure that you have enough control and skills to practice the current weight. Proper weight increase can help you improve your strength and muscle mass, but if the weight is too heavy, your shape and skills may be affected and the risk of injury will increase.