Dumbbell Curls

I like using dumbells but when it comes to dumbell curls
I hate doing dumbbell curls because I never feel a good
contraction, as hard as I squeeze upon contraction I dont
get the "tight feeling" in my biceps.

The way I do my DB curls I lock them next to my sides
slightly let them go forward once im curling them.

Any suggestions for better "burn" sensation feeling??
how can I contract my bi's effectively?

Try doing them seated one arm at a time.

Rest your elbow on the inner part of your knee for stability. Keep your upper body still. The only movement should be at the pivot of the elbow.

Do a set of 5 - 10 reps with your right hand, and then switch to your left hand.

Make certain that you allow your arm to go to full extension at the bottom of the lift.

Don't pull back your body as you are curling or you will be cheating.

Here's a video:

http://www.youtube.com/watch?v=fAZLMvtN0g0

One of my favorite curls and by chance also Arnold's is a incline curl. Sit on an incline bench, lean back, and hold the bells out at your sides letting them dangle. Put your feet up on the end cap of bench. Start from a hammer curl position and bring your right arm up twisting the bell inward (supination) as you raise it. Lower and repeat other side. Do a set of 8-10, 6-8, 4-6, and 20 reps. Adjust weight accordingly.

Hollywood Personal Trainer

One of my favorite curls and by chance also Arnold's is a incline curl. Sit on an incline bench, lean back, and hold the bells out at your sides letting them dangle. Put your feet up on the end cap of bench. Start from a hammer curl position and bring your right arm up twisting the bell inward (supination) as you raise it. Lower and repeat other side. Do a set of 8-10, 6-8, 4-6, and 20 reps. Adjust weight accordingly.

Hollywood Personal Trainer

There are several advantages in this type of curl. The primary ones are that you will have a hard time cheating with this form, and you will develop a long biceps because of the position of the arm.

The downside is that some people will experience should pain from this, and if that shows up then a different exercise is a good idea.