Time out, a talk with the child, an explanation
Just make sure you work out every night and try the same ones also eat healthy no breads or like fried foods
Fencing (sword fighting) can impact a child's self esteem by teaching them chivalry and respect, as well as exercising them, a parent's role is simply to support them, same can apply to Baseball.
I agree with the speaker that the ability to learn is not fixed and can change with your effort because the more you persevere to know, the more knowledge you will gain and acquire. Moreover, the more we sharpen our brain, it will get more information that we need and we can use it in our way of life especially in our decision-making.