The minor is located on the outside of the body, so targeting it in order build the inner chest is pointless. Also, it is such a small muscle compared to the minor that it would hardly make a difference in appearance. Furthermore, it isn't even attached to the arms, so the idea that you can target it by doing these arm movements is false.
You are probably confusing the two heads of the pec major with the pec major and minor. The heads can not be isolated from eachother, despite what you feel. Even if they could, they stretch horizontally accross the body, so it would be impossible to emphasize an inner part of either.
Anyway, if you aren't eating enough food to build muscle it doesn't matter what you do.
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