Good afternoon all.
I have a question regarding exercise and definition. Here's a pic below of what I am asking:
I was wondering what exercises can you do to achieve that, "crease" or muscular separation? I'm pretty sure as with Abs it requires a low body fat %, but aside from that - what exercises stimulate the growth and give your bicep - a bicep not just a singe large mass. I was thinking something along the lines of shoulders? Or do even triceps kind of make a play in that, as they almost wrap around in a sense.
I do have rotator cuff issues on and off, so I don't do alot of dumbbell shoulder presses as I use to, moreso barbell ..
Any thoughts and advice? I would really appreciate it.