please help

[brendanjev]

I was told 3 sets of 8-12 reps for size. I get through the first 2 sets fine, but by the third i have muscle failure by 6 reps. Should I move down in weight?

[bryanc]

I'm not going to comment on the appropriateness of the advice you were given, but yes, if you are unable to complete the number of reps you're supposed to and it's important in your program to do so, then you should move down in weight.

[DKing]

I will comment on the rep range. Its not bad in itself, but there is nothing magical about 8-12 reps. Its all about volume and load. Of course this is assuming diet is in order. Don't fall into the trap of only working in the 3 sets of 8-12 reps trap. Vary your approaches and you will see better gains.

I agree with Bryan on the original question.

Danny