Out of curiosity - can you perform too may sets per muscle?
Reason being, out of my own enjoyment, I like to do a lot of extra exercises in my work outs - when I have time!
As an example, on a chest day I sometimes perform up to 25 sets on chest alone. This could consist of 7 exercises, with sets of 3 but I like to include - what I call - burn sets, where I will do a 4th high rep set, or sometimes I will experiment with up-down sets, drop sets etc or just make something up e.g "21's" with a barbell(bench press), 21's with pec deck (bring handles together, 7 reps left side, 7 reps right side, then 7 reps both sides), before I know it, I have done 20-25 sets.
I do have a set routine of usually 4 exercises, all the messing about happens after this - time permitting, even if my strength is zapped, I will just do the exercises with a light weight.
I don't do this for any particular reason other than I really enjoy training and don't want my work out to end but I do get paranoid that I am doing myself more harm than good. I am aware of overtraing in terms of recovery but can you overtrain in one single work out? e.g too many sets?