Thats because you've been training them your entire back workout. I don't think you need to do the direct bicep training. I also believe it is a bad idea to do it on a leg day, hopefully you will have used whatever energy you had on that. Adding in deadlifts on back day would increase your bicep size (Depending on how big you are). But if you're going to stick with it then you should be fine adding the chins.




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back as i can only




