Even if you know all your strength, it is impossible to determine the weight you need. Because-you need all kinds of weights.

For example, if you practice biceps, your weight is 65,438+00 kg, but if you practice side lifts, your weight is too heavy. If you practice chest muscles, this weight may be lighter-because the strength of different parts of the human body is different. As the saying goes, arms are not as good as thighs. Isn't that what it means?

Moreover, with the progress of exercise, after half a year, you may get fat. Do you still want to buy dumbbells?

Just buy a combination dumbbell, and you can increase or decrease the weight freely.