Lagging Body Parts !!

If you guys have a body part that is lagging behide what is it.. Mine is my inner chest and my arms.. I have been hitting my inner forever and it seems like it is getting no where.. The rest of my chest is thick !!! Wat do you guys think is going on here !!! And I know the problem with my arms are that they to dam long !!!:curse:

I don't think you can "target" inner chest. You look to have very good chest development. Other lagging bodyparts I simply research new and different strategies until I find one that works. It's a constant game.