I'm going to gym and i want to improve muscular endurance . My trainer (actually he's not a professional trainer, and i'm not trusting him) told me you have to do high reps with low weights .
For example, i'm doing Bench Press 3 set 15 reps . Because of 15 reps, i working with low weights. For example, i can do 10 reps with 35 KGS , but i can't do 15 reps with 35 KGS . So, i'm working with 20 KGS (yes, there are big difference) so i can do 15 reps.
I'm not sure 15 reps is good, or too much. I read a few articles about increasing endurance, all of them saying "8-10 reps", or i misunderstood them. What do you think about my training system ? I'm working with this, for a few weeks. But i want to see my muscles' improvement, i mean my biceps are still small (for example) . I want grow them.
In shortly, I'm doing 15 reps with low weights (but i'm always trying to increase weight). I want to increase muscular endurance and gain more muscle. Should i decrease reps number and increase weight?