A: Not only can you, but you should stick to it all the time. It is better to sweat a little!
You said "thin since childhood". There is a saying in Chinese medicine, "Fat people have more phlegm and thin people have more fire"; This statement is true, this "fire" refers to the "virtual fire" in the body; More common in liver and kidney meridian deficiency fire. Practicing dumbbell fitness and sweating a little will make the flow of qi and blood in the body smoother, so the healthy qi will gradually flourish, and the "virtual fire" will naturally be suppressed by the vigorous healthy qi and gradually recede; So as to achieve the purpose of fitness.
Stick to it for a while, your appetite will increase greatly, and you won't lose weight.