Inner tris?

[mayhems]

not sure if it has a name but the inside of the arm, i cant seem to get much definition.. i saw this guy at the gym and it was like a up side down V in his tricep.

 

[Chi town]

I think you're talking about the head on the side of the arm...lateral head?
It's not easy to really target that head. Sometimes for an isometric, I'll do one-hand reverse grip pull downs to hit that head. But instead of facing the rack, stand with your opposite shoulder toward the rack. This way, it's more of a sideways pull accross your chest...light wight...strict form.

 

[mayhems]

is that the only exercise that will hit it?

 

[steig]

try doing tricep extensions with your palms facing up rather than towards your body. I feel this movement on the inside of my tris.

 

[ruggermu]

Maybe it's just me cause I've had some shoulder issues but reverse grip extensions hurt my shoulder, BAD