After my arm workouts I can always feel it in the front portion of my bi, but the back part never feels worked out enough. Is that common or am I missing something? My arm workout is as follows.
Barbell curls 4 sets of 10
Dumbell hammer curls 4 sets of 10
Preacher curls 4 sets of 10
Reverse preacher curls 4 sets of 10 <-- not sure the correct term for this but basically my hands are over the bar instead of under it...
Thanks