Yes Muscle will increase, and the effect is obvious. You said that my condition is the same as mine, and my congenital constitution is relatively poor. According to my experience, muscles will increase a lot through exercise, but the degree of muscle retention is not as good as others. Eating nothing is a common problem of our thin people (I am not very thin now), so we should start with the stomach. Although we eat more, we waste more and absorb less.