Doing more than a basic set of arm exercises and using more than one type of movement does not lead to noticeably greater muscle growth compared to a minimal routine.

We analyzed the available evidence on whether doing more arm exercises and compound movements leads to greater muscle growth beyond a minimal routine. What we’ve found so far is that 60 studies or assertions support the idea that increasing volume and variety in arm training does not result in noticeably greater muscle growth compared to a basic routine, and no studies contradict this finding [1]. This suggests that, at least for arm muscles, adding extra sets, exercises, or movement patterns may not provide a meaningful benefit if you’re already doing a simple, consistent routine. Muscle growth seems to respond well to a baseline level of stimulus — enough to challenge the muscle — but going beyond that doesn’t appear to trigger significantly more growth. This could mean that for many people, focusing on consistency and proper form with a few key movements may be just as effective as more complex programs. It’s important to note that this doesn’t mean minimal routines are best for everyone — individual goals, training history, and recovery capacity can vary. But based on what we’ve reviewed so far, the added effort of more exercises or higher volume doesn’t clearly translate to more muscle in the arms. For someone looking to build arm size, this means you might not need to do five different bicep exercises or six triceps movements. A simple routine done well and consistently may be enough.