I have always been an amateur sports lover and often go to the gym. However, after N years of exercise, I found a problem, that is, the forearm, especially the wrist, has never been rough and I don't know how to practice. The upper arm is thick from shoulder to shoulder, while the forearm, especially the wrist, is thin (natural reasons), which is very uncoordinated. Doing manual labor can obviously make me feel better than the average person, but I can't beat others, even those who are much thinner than me.

So I want to ask an expert with rich professional knowledge: how to exercise the forearm, especially the wrist?

Now, my exercise method is to use my elbow as the support point on my thigh, hold the dumbbell with one hand and twist it up and down with the strength of my wrist. I don't know, right?

I hope I can communicate with friends who like fitness here, hehe.