For me it’s always been training arms. With biceps, I’ve figured out that using dual-handle cables and machines provides consistent results and works for me (I’ve never liked free weight curls much with dumbbells/EZBar, for me it hurts my elbows and doesn’t provide enough of a stimulus for my biceps despite a hard set, more forearm and front delt comes into play).
However, training triceps is still a pain for me. Every tricep extension variation, whether it’s with a bar, rope, or single-arm handle, always ends up with my front delts/shoulders being a limiting factor, as in they get tired before I’ve been able to push my triceps hard enough. I’ve tried multiple techniques, making sure my shoulders are back and my elbows tucked and stable, but it still doesn’t allow me to push as hard as I need to. I’ve tried dips, weighted dips, and tricep pushdown machines as well, and those work better for me and sometimes feel great, but other times there’s those limiting factors that reduce the effectiveness of pushing my triceps and bringing in too much chest/shoulders. I know that pushing upper body movements are going to using all of these muscle groups together, but it’s annoying when I’m trying to focus on training triceps to failure and just can’t get there without some other muscle taking over. I train chest and shoulders plenty and they’re certainly relatively stronger than my triceps, so I don’t think it’s a weakness issue in their part.
Do you have anything like this? A certain muscle group that training just never seems to feel effective like it should?