It would help, OP, if you mentioned what bodypart you want to atrophy, then we could hoffer suggestions…or at least focus our humorous jabs better.
You really cannot judge which “muscles” are too big without getting down to very low bf%.
Even if you did… why not bring up the rest?
Stop training it?
Concentrated atrophy is not possible to a large effect if you continue to train. For example, if the muscle you’re talking about is your abs, then exercises like squating (bracing the core with the abs), 1 arm DB rows (anti rotation training of the abs), etc. will likely provide enough stimulus to naturally prevent atrophy in that muscle group. If the muscle is just naturally large, there is not much you can do about it. Although you can do things to minimize it’s appearance for example if it is the abs that’s “too large” then you can do something to accentuate the V-taper.
The only way to induce a large amount of overall atrophy is to stop training, hence why i posted the pic of the motorized wheelchair. If you don’t walk, you’ll be all set to atrophy 
I think there’s little you can do, but I’ve been proved wrong before. Good luck.
[quote]trextacy wrote:
[quote]Fezzik wrote:
[quote]tsukinokage wrote:
what if the imbalance is very prevailant (such as excessive growth in one area due to genetics).
[/quote]
I have excessive growth in one area due to genetics [/quote]
pics of said clit[/quote]
hahahaha forums are funny as fuck today!
[quote]BulletproofTiger wrote:
Concentrated atrophy is not possible to a large effect if you continue to train. For example, if the muscle you’re talking about is your abs, then exercises like squating (bracing the core with the abs), 1 arm DB rows (anti rotation training of the abs), etc. will likely provide enough stimulus to naturally prevent atrophy in that muscle group. If the muscle is just naturally large, there is not much you can do about it. Although you can do things to minimize it’s appearance for example if it is the abs that’s “too large” then you can do something to accentuate the V-taper.
The only way to induce a large amount of overall atrophy is to stop training, hence why i posted the pic of the motorized wheelchair. If you don’t walk, you’ll be all set to atrophy I think there’s little you can do, but I’ve been proved wrong before. Good luck.[/quote]
I think we first need to hear what muscle(s) the OP is talking about. I highly doubt its going to be arms or shoulders, it is most likely going to be legs, which he probably already only trains 1x per week if that.
For this discussion to really be of any value, we need the OP’s pics, strength on different lifts, and what muscles he’s talking about.
The best solution though, regardless of the muscle, is to just bring up lagging areas, rather then try to reduce the areas that are “overdeloped”
Failtroll is obvious.