Does increasing weekly sets from 9 to 18 or 27 improve biceps growth in trained young men over 6 weeks?
What the Evidence Shows
What we've found so far suggests that increasing weekly sets for biceps from 9 to 18 or 27 does not lead to noticeable additional growth in trained young men over a 6-week period [1]. Our analysis of the available research shows a small trend toward more growth with higher volume, but the difference isn’t meaningful in practice [1].
We looked at one key assertion from the data, which is based on findings supported by 63.0 studies or analyses . These results focus on young men who already lift weights regularly. Even when they doubled or tripled their weekly sets, their biceps didn’t grow noticeably more over six weeks . That doesn’t rule out a minor benefit — the evidence leans toward a slight increase in growth — but it’s not enough to see a real-world difference .
It’s important to note that our current analysis is based on limited assertions — just one clear claim so far — even though it draws from a large body of supporting data . We can’t say whether longer training periods, different exercises, or other populations (like women or older adults) would show different results. Also, we don’t have enough evidence yet to determine if higher volume might help over time, or if there’s a point where more sets stop helping altogether.
The takeaway: if you’re a young man who already lifts weights, doing more biceps sets each week might give a tiny boost in growth, but don’t expect to see a clear difference in six weeks. For now, more volume doesn’t seem to mean noticeably bigger biceps — at least not in the short term.