At the beginning of strength training, you should choose dumbbells with appropriate weight to practice, so as to avoid being injured due to overweight. At the same time, with the progress of training, the weight of dumbbells can be gradually increased to achieve better training results.
It should be noted that the weight selection of dumbbells should be based on personal circumstances, because physical characteristics and training level will have an impact on the training effect. It's best to consult a professional fitness instructor and make a personalized training plan before starting training.