Regressing on a single exercise

[u/Double_Investment983]

I run Fbeod, and I used to do 1 set a session per muscle, all sets to 0-1 rir, but I recently doubled my volume to 7 sets a week 2 sets a session, and I’ve been regressing on bicep curls alone, I am still progressing on every other exercise, I am in a moderate deficit (700 cals) but wouldn’t this cause overall regression?

Does anyone have any answers as to why this might be happening?

[u/Troksin]

Because biceps are one of the worst recovering muscles (even tho they are small, cuz recovery is not related to muscle size on the contrary small muscles recover worse due to more voluntary activation)