The joints of my elbow twinge with pain when i extend fully, or retract fully.

They dont hurt when normal.

Am i doing something wrong or is it just like joggers knee or something?

it sounds 2 me like you could have a little tendonitis in your elbow which is why it hurts when your fully retracted or when the elbow is bent, it usually happens when you have upped your program or have been maybe overtraining, problem is you usually have 2 wait for it 2 go on its own which means resting it.

I got the same exact problem, u got about a week of pain homie....