Biceps dumbbell hammer curls is a perfect tennis fitness exercise that strengthens your forearms and biceps. If you are a serious tennis player, it is important that you are strengthening your forearms muscles. You are using this muscles a lot when you are playing tennis. Also, it is necessary to strengthening your weaker side, the non dominant hand. When doing dumbbell exercises, try always start with your non dominant hand. Become a member and learn from the exercise instructions, and the how to video of the dumbbell hammer curls.
At the age of 15, you can start using the biceps dumbbell cur.