Unlike the biceps the triceps are often overlooked by many beginners.
That’s a shame because they make up about two thirds of the upper arm.
So bigger triceps actually benefit your arm size more than bigger biceps.
As you might expect due to the name,TRI it’s a 3-headed muscle group, with a long head, a lateral head and a medial head.
The purpose of the triceps is to straighten your arms.
So any exercise that STRAIGHTEN YOUR ARMS is going to work the muscle.
Similar to the biceps you should do very little isolation work for the triceps and instead focus on compound pushing exercises.
Like bench pressing, overhead pressing, or dips.
Again the reason for this is that compound exercises allow you to lift heavier weights which equal better muscle development.
Next to the compound movements I just mentioned you can isolate the triceps with movements like triceps extensions, rope push downs, or skull crushers.