Arm training is where most men spend a disproportionate amount of their gym time, and where many see the least proportional return. If your biceps and triceps have stalled despite regular direct work, the problem is almost certainly not that you need more curls. ADVERTISEMENT
The first and most important thing to understand about arm development is that roughly two-thirds of upper arm size comes from the triceps, not the biceps. Most men who want bigger arms spend most of their direct arm training on biceps.
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