I believe the biceps "swell" as a result of the gear "irritating" the muscle. This doesn't seem to be the case with everyone, so you are fortunate. I think that this swelling causes the muscle facia to stretch, and while this is temporary, it provides room for new muscle growth (similar to
seo).
I'm currently pumping a shitload of
seo in my biceps and getting very little response. Next week I'm gonna add Nolotil - that'll get that muscle to STRETCH! ROTFLMAO
xcelbeyond /t\